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): 6.94 in 1950 → 1.98 in 2023 (−71%). Threshold: below 2.1 since 2019. The trend broke around 1965 and 1999: −0.01 → −0.12 → −0.04 a year.
Births: 369k in 1950 → 540k in 2023 (+46%). Peak: 685k in 1990; the latest value is 21% lower. The trend broke around 1968 and 1989: +10.7k → +6.15k → −4.93k a year.
Population: 7.68M in 1950 → 33.8M in 2023 (×4.4).
Internet: 0% in 1990 → 82% in 2024 (+82 pp). Thresholds: above 10% since 2003, above 50% since 2017. Fastest growth in 2016–2021: 45.5% → 71.1%.
Urban share: 46.7% in 1960 → 85.6% in 2025 (+39 pp). Thresholds: above 50% since 1964, above 75% since 2006. The trend broke around 1975: change slowed down (+1.1 → +0.41 a year).
GDP per person (PPP): 6,316 PPP dollars in 1990 → 16,079 PPP dollars in 2025 (×2.5). The trend broke around 2004 and 2014: +154 → +612 → +110 a year.
GDP growth: on average 0.6% in the 1980s, 3.2% in the 1990s, 5.0% in the 2000s, 4.5% in the 2010s, 2.0% in the 2020s. Lowest: −13.4% in 1989; highest: 13.4% in 2021.
Inflation: on average 481.3% in the 1980s, 807.9% in the 1990s, 2.6% in the 2000s, 2.8% in the 2010s, 4.0% in the 2020s. Lowest: 0.2% in 2002; highest: 7,482% in 1990.
What changed at the same time
The fastest decline of "Fertility (TFR)" was in 1972–1982: 6.09 → 4.80. Over the same years: births 586k → 646k; population 14.2M → 18.2M; urban share 59.6% → 65.7%; GDP growth −0.3% (1982); inflation 64.5% (1982); no data for the others in those years.
Over the last 10 years (2013–2023): fertility (TFR) 2.32 → 1.98; births 561k → 540k; population 29.8M → 33.8M; internet 39.2% → 79.5%; urban share 79.3% → 84.8%; GDP per person (PPP) 14,050 PPP dollars → 15,342 PPP dollars; GDP growth 5.9% → −0.4%; inflation 2.8% → 6.3%.
How the indicators relate
Fertility (TFR) and internet (1990–2023, 31 years): levels are strongly related, in opposite directions (r = −0.89); year-to-year changes show no reliable link (r = 0.09). This looks like a shared trend: both change over time, but not in step from year to year.
Fertility (TFR) and urban share (1960–2023, 64 years): levels are strongly related, in opposite directions (r = −0.97); year-to-year changes show no reliable link (r = 0.53). 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) (1990–2023, 34 years): levels are strongly related, in opposite directions (r = −0.90); year-to-year changes show no reliable link (r = 0.17). This looks like a shared trend: both change over time, but not in step from year to year.
Forecasts vs actual
Fertility (TFR): past UN projections. The outcome was below the projection in 11 of 11 revisions (1998–2022) and above in none; median gap −5.2%.
The UN 2002 projection expected today's level (1.98, 2023) only around 2031: reality is 8 years ahead of it.
The UN 2022 projection expected today's level (1.98, 2023) only around 2035: reality is 12 years ahead of it.
Fertility (TFR): UN 2024 projection (medium): 2050 — 1.74 (−12% vs 2023), 2100 — 1.69 (−15% vs 2023); low variant for 2100: 1.19.
Births: past UN projections. The outcome was below the projection in 11 of 11 revisions (1998–2022) and above in none; median gap −8.4%.
The UN 2002 projection expected today's level (540k, 2023) only around 2035: reality is 12 years ahead of it.
The UN 2022 projection expected today's level (540k, 2023) only around 2040: reality is 17 years ahead of it.
Births: UN 2024 projection (medium): 2050 — 455k (−16% vs 2023), 2100 — 327k (−39% vs 2023); low variant for 2100: 120k.
Population: past UN projections. The outcome was below the projection in 10 of 12 revisions (1998–2022) and above in 2; median gap −1.6%.
The UN 1998 projection expected this level (33.8M) already around 2020: reality is 3 years behind it.
The UN 2019 projection expected this level (33.8M) already around 2022: reality is 1 year behind it.
Population: UN 2024 projection (medium): 2050 — 40.6M (+20% vs 2023), 2100 — 38.2M (+13% vs 2023); low variant for 2100: 25.7M.
GDP growth: IMF next-year forecasts (36 editions, 2007–2024). On average the outcome was 1 pp below the forecast; below it in 50% of cases; typical error ±2.9 pp. The biggest miss was for 2020: IMF, April 2019 expected 4%, the outcome was −10.9%.
GDP growth: latest IMF forecast (IMF, April 2026): 2026 — 2.8%, 2028 — 2.8%, 2031 — 2.8%.
Inflation: IMF next-year forecasts (36 editions, 2007–2024). On average the outcome was 0.9 pp above the forecast; below it in 31% of cases; typical error ±1.3 pp. The biggest miss was for 2022: IMF, April 2021 expected 2%, the outcome was 7.9%.
Inflation: latest IMF forecast (IMF, April 2026): 2026 — 2.5%, 2028 — 2%, 2031 — 2%.
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
34.8M
33.8M
−2.8%
UN 2000
2023
23 years
34.8M
33.8M
−2.8%
UN 2002
2023
21 years
34.9M
33.8M
−3.1%
UN 2004
2023
19 years
35.4M
33.8M
−4.5%
UN 2006
2023
17 years
33.5M
33.8M
+1%
UN 2008
2023
15 years
33.9M
33.8M
−0.1%
UN 2010
2023
13 years
33.4M
33.8M
+1.3%
UN 2012
2023
11 years
34.2M
33.8M
−1%
UN 2015
2023
8 years
34.4M
33.8M
−1.7%
UN 2017
2023
6 years
34.4M
33.8M
−1.7%
UN 2019
2023
4 years
34M
33.8M
−0.4%
UN 2022
2023
1 year
34.4M
33.8M
−1.5%
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
2015–2020
20 years
581k
543k
−6.5%
UN 2000
2015–2020
18 years
581k
543k
−6.5%
UN 2002
2015–2020
16 years
596k
543k
−8.8%
UN 2004
2015–2020
14 years
632k
543k
−14%
UN 2006
2015–2020
12 years
581k
543k
−6.5%
UN 2008
2015–2020
10 years
572k
543k
−5%
UN 2010
2015–2020
8 years
571k
543k
−4.9%
UN 2012
2015–2020
6 years
593k
543k
−8.4%
UN 2015
2015–2020
2 years
605k
543k
−10.3%
UN 2017
2015–2020
0 years
606k
543k
−10.4%
UN 2022
2023
1 year
589k
540k
−8.4%
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
2015–2020
20 years
2.16
2.14
−1%
UN 2000
2015–2020
18 years
2.16
2.14
−1%
UN 2002
2015–2020
16 years
2.22
2.14
−3.7%
UN 2004
2015–2020
14 years
2.36
2.14
−9.2%
UN 2006
2015–2020
12 years
2.25
2.14
−5%
UN 2008
2015–2020
10 years
2.22
2.14
−3.6%
UN 2010
2015–2020
8 years
2.26
2.14
−5.2%
UN 2012
2015–2020
6 years
2.29
2.14
−6.7%
UN 2015
2015–2020
2 years
2.35
2.14
−9.1%
UN 2017
2015–2020
0 years
2.35
2.14
−9.2%
UN 2022
2023
1 year
2.14
1.98
−7.7%
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
−1 pp
2.9 pp
50%
Inflation
36
+0.9 pp
1.3 pp
31%
Unemployment rate
29
+0.4 pp
1.3 pp
55%
Government gross debt
28
+0.1 pp
2.6 pp
64%
All indicators
Demography
Population
33.8M persons, 1 July latest value, 2023
Population on 1 July. UN estimate to 2023, medium variant from 2024; past UN revisions for forecast checks.