Computed with the same code as the observations under the main chart and in the API (get_insights). Moving together in time does not prove a cause.
How the indicators changed
Fertility (TFR): 6.41 in 1950 → 1.00 in 2025 (−84%). Peak: 6.74 in 1959; the latest value is 85% lower. Thresholds: below 2.1 since 2009, below 1.5 since 2024. The trend broke around 1962 and 1980: +0.03 → −0.18 → −0.05 a year.
Births: 546k in 1950 → 442k in 2025 (−19%). Peak: 913k in 1994; the latest value is 52% lower. The trend broke around 1960 and 1998: +17.5k → +4.85k → −11.6k a year.
Population: 11.8M in 1950 → 52.3M in 2023 (×4.4).
Internet: 0% in 1990 → 79.3% in 2024 (+79 pp). Thresholds: above 10% since 2005, above 50% since 2013. Fastest growth in 2007–2012: 21.8% → 49%.
Urban share: 48.1% in 1960 → 78.8% in 2025 (+31 pp). Thresholds: above 50% since 1962, above 75% since 2002. The trend broke around 1974 and 2003: +0.98 → +0.48 → +0.12 a year.
GDP per person (PPP): 9,999 PPP dollars in 1990 → 18,779 PPP dollars in 2025 (+88%). The trend broke around 2003 and 2014: +64 → +457 → +210 a year.
GDP growth: on average 3.4% in the 1980s, 2.9% in the 1990s, 3.9% in the 2000s, 3.7% in the 2010s, 2.7% in the 2020s. Lowest: −7.2% in 2020; highest: 10.8% in 2021.
Inflation: on average 23.4% in the 1980s, 22.1% in the 1990s, 6.3% in the 2000s, 3.7% in the 2010s, 6.6% in the 2020s. Lowest: 2% in 2013; highest: 30.3% in 1991.
What changed at the same time
The fastest decline of "Fertility (TFR)" was in 1964–1974: 6.48 → 4.53. Over the same years: births 766k → 756k; population 17.6M → 22.8M; urban share 52% → 61.5%; no data for the others in those years.
Over the last 10 years (2015–2025): fertility (TFR) 1.77 → 1.00; births 694k → 442k; population 47M (2015); internet 55.9% → 79.3%; urban share 77.2% → 78.8%; GDP per person (PPP) 16,821 PPP dollars → 18,779 PPP dollars; GDP growth 3% → 2.6%; inflation 5% → 5.1%.
How the indicators relate
Fertility (TFR) and internet (1990–2024, 32 years): levels are strongly related, in opposite directions (r = −0.95); year-to-year changes show no reliable link (r = 0.12). This looks like a shared trend: both change over time, but not in step from year to year.
Fertility (TFR) and urban share (1960–2025, 66 years): levels are strongly related, in opposite directions (r = −0.99); year-to-year changes show no reliable link (r = −0.34). This looks like a shared trend: both change over time, but not in step from year to year.
Fertility (TFR) and GDP per person (PPP) (1990–2025, 36 years): levels are strongly related, in opposite directions (r = −0.95); year-to-year changes show no reliable link (r = 0.07). This looks like a shared trend: both change over time, but not in step from year to year. Changes line up best with a 4 years shift: "GDP per person (PPP)" moves first, then "Fertility (TFR)" (r = 0.61).
Forecasts vs actual
Fertility (TFR): past UN projections. The outcome was below the projection in 12 of 12 revisions (1998–2022) and above in none; median gap −29%.
The UN 2002 projection did not expect today's level (1.00, 2025) before its horizon ended (2047).
The UN 2012 projection did not expect today's level (1.00, 2025) before its horizon ended (2097).
Fertility (TFR): UN 2024 projection (medium): 2050 — 1.58 (+58% vs 2025), 2100 — 1.60 (+60% vs 2025); low variant for 2100: 1.10.
Births: past UN projections. The outcome was below the projection in 12 of 12 revisions (1998–2022) and above in none; median gap −27%.
The UN 2004 projection did not expect today's level (442k, 2025) before its horizon ended (2047).
The UN 2022 projection expected today's level (442k, 2025) only around 2080: reality is 55 years ahead of it.
National statistics for 2025: 442k, 36% below the UN 2024 medium variant (693k) and below its 95% interval.
Births: UN 2024 projection (medium): 2050 — 545k (+23% vs 2025), 2100 — 359k (−19% vs 2025); low variant for 2100: 118k.
Population: past UN projections. The outcome was below the projection in 8 of 12 revisions (1998–2022) and above in 4; median gap −3%.
The UN 1998 projection expected this level (52.3M) already around 2013: reality is 10 years behind it.
The UN 2012 projection expected this level (52.3M) already around 2019: reality is 4 years behind it.
Population: UN 2024 projection (medium): 2050 — 59.4M (+14% vs 2023), 2100 — 47.1M (−10% vs 2023); low variant for 2100: 31M.
GDP growth: IMF next-year forecasts (36 editions, 2007–2024). On average the outcome was 0.3 pp below the forecast; below it in 64% of cases; typical error ±2.2 pp. The biggest miss was for 2020: IMF, April 2019 expected 3.6%, the outcome was −7.2%.
GDP growth: latest IMF forecast (IMF, April 2026): 2026 — 2.3%, 2028 — 2.6%, 2031 — 2.8%.
Inflation: IMF next-year forecasts (36 editions, 2007–2024). On average the outcome was 1.2 pp above the forecast; below it in 33% of cases; typical error ±1.8 pp. The biggest miss was for 2023: IMF, April 2022 expected 4.2%, the outcome was 11.7%.
Inflation: latest IMF forecast (IMF, April 2026): 2026 — 5.9%, 2028 — 3.4%, 2031 — 3%.
UN projections vs actual
Solid line: actual data, UN WPP 2024 estimates to 2023, then national statistics where comparable with the UN. Dashed: medium variants of past UN revisions. The table shows what each revision expected for the latest year (or five-year period) with actual data.
Population
persons, 1 July
Actual
UN 1998
UN 2000
UN 2002
UN 2004
UN 2006
UN 2008
UN 2010
UN 2012
UN 2015
UN 2017
UN 2019
UN 2022
UN 2024, medium
Release
Target period
Horizon
Expected
Actual
Actual vs expected
UN 1998
2023
25 years
58.5M
52.3M
−10.6%
UN 2000
2023
23 years
57.9M
52.3M
−9.7%
UN 2002
2023
21 years
57M
52.3M
−8.3%
UN 2004
2023
19 years
56.7M
52.3M
−7.7%
UN 2006
2023
17 years
54.7M
52.3M
−4.3%
UN 2008
2023
15 years
53.9M
52.3M
−2.9%
UN 2010
2023
13 years
53.7M
52.3M
−2.6%
UN 2012
2023
11 years
54M
52.3M
−3%
UN 2015
2023
8 years
51.3M
52.3M
+2.1%
UN 2017
2023
6 years
51.2M
52.3M
+2.1%
UN 2019
2023
4 years
51.7M
52.3M
+1.3%
UN 2022
2023
1 year
52.1M
52.3M
+0.5%
Births
births per year
Actual
UN 1998
UN 2000
UN 2002
UN 2004
UN 2006
UN 2008
UN 2010
UN 2012
UN 2015
UN 2017
UN 2019
UN 2022
UN 2024, medium
Release
Target period
Horizon
Expected
Actual
Actual vs expected
UN 1998
2020–2025
24 years
994k
632k
−36.4%
UN 2000
2020–2025
22 years
986k
632k
−35.9%
UN 2002
2020–2025
20 years
964k
632k
−34.5%
UN 2004
2020–2025
18 years
926k
632k
−31.7%
UN 2006
2020–2025
16 years
828k
632k
−23.7%
UN 2008
2020–2025
14 years
876k
632k
−27.8%
UN 2010
2020–2025
12 years
851k
632k
−25.8%
UN 2012
2020–2025
10 years
862k
632k
−26.6%
UN 2015
2020–2025
8 years
691k
632k
−8.5%
UN 2017
2020–2025
6 years
691k
632k
−8.5%
UN 2019
2020–2025
4 years
709k
632k
−10.8%
UN 2022
2025
3 years
693k
442k
−36.3%
Total fertility rate
children per woman
Actual
UN 1998
UN 2000
UN 2002
UN 2004
UN 2006
UN 2008
UN 2010
UN 2012
UN 2015
UN 2017
UN 2019
UN 2022
UN 2024, medium
Release
Target period
Horizon
Expected
Actual
Actual vs expected
UN 1998
2020–2025
24 years
2.21
1.49
−32.7%
UN 2000
2020–2025
22 years
2.21
1.49
−32.7%
UN 2002
2020–2025
20 years
2.21
1.49
−32.7%
UN 2004
2020–2025
18 years
2.12
1.49
−30%
UN 2006
2020–2025
16 years
1.94
1.49
−23.3%
UN 2008
2020–2025
14 years
2.10
1.49
−29.3%
UN 2010
2020–2025
12 years
2.04
1.49
−27.2%
UN 2012
2020–2025
10 years
2.06
1.49
−27.8%
UN 2015
2020–2025
8 years
1.74
1.49
−14.7%
UN 2017
2020–2025
6 years
1.74
1.49
−14.6%
UN 2019
2020–2025
4 years
1.73
1.49
−13.9%
UN 2022
2025
3 years
1.68
1.00
−40.4%
IMF forecasts vs actual
Solid line: actual values from the latest IMF edition (data get revised, so we use the newest). Dashed: April editions, current year and five years ahead. The table covers next-year forecasts from all editions: mean error shows bias, mean absolute error shows accuracy.
Real GDP growth
% per year
Actual (IMF)
WEO, April editions
Indicator
Forecasts
Mean error
Mean absolute error
Actual below forecast
Real GDP growth
36
−0.3 pp
2.2 pp
64%
Inflation
36
+1.2 pp
1.8 pp
33%
Unemployment rate
29
−0.6 pp
1.5 pp
72%
Government gross debt
28
+4.6 pp
6.3 pp
32%
All indicators
Demography
Population
52.3M persons, 1 July latest value, 2023
Population on 1 July. UN estimate to 2023, medium variant from 2024; past UN revisions for forecast checks.