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): 6.66 in 1950 → 4.32 in 2023 (−35%). Peak: 7.02 in 1971; the latest value is 38% lower. The trend broke around 1961 and 1971: 0 → +0.04 → −0.05 a year.
Births: 297k in 1950 → 1.68M in 2023 (×5.7). The trend broke around 2014: change sped up (+18.8k → +32.2k a year).
Population: 6.19M in 1950 → 50M in 2023 (×8.1). The trend broke around 2007: change sped up (+549k → +1.13M a year).
Internet: 0% in 1990 → 18.6% in 2017 (+19 pp). Threshold: above 10% since 2015. Fastest growth in 2002–2007: 0.4% → 8.7%.
Urban share: 11.7% in 1960 → 34.9% in 2025 (+23 pp). The trend broke around 1985 and 1991: +0.38 → +1.5 → +0.1 a year.
GDP per person (PPP): 2,460 PPP dollars in 1990 → 1,873 PPP dollars in 2025 (−24%). Peak: 4,468 PPP dollars in 2011; the latest value is 58% lower. The trend broke around 2007 and 2018: +117 → −34 → −319 a year.
GDP growth: on average 2.7% in the 1980s, 5.3% in the 1990s, 5.6% in the 2000s, −0.4% in the 2010s. Lowest: −17% in 2012; highest: 10.9% in 2001.
Inflation: on average 40.2% in the 1980s, 70.1% in the 1990s, 10.3% in the 2000s, 32.1% in the 2010s, 170.7% in the 2020s. Lowest: −0.9% in 1990; highest: 359.1% in 2021.
What changed at the same time
The fastest decline of "Fertility (TFR)" was in 2012–2022: 5.03 → 4.38. Over the same years: births 1.35M → 1.66M; population 36.9M → 49.4M; urban share 33.1% → 34.7%; GDP per person (PPP) 4,146 PPP dollars → 3,132 PPP dollars; GDP growth −17% (2012); inflation 35.6% → 138.8%; no data for the others in those years.
How the indicators relate
Fertility (TFR) and internet (1990–2017, 16 years): levels are strongly related, in opposite directions (r = −0.91); year-to-year changes show no reliable link (r = −0.48). 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 = −0.90); year-to-year changes show no reliable link (r = 0.05). 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 barely related (r = −0.33); year-to-year changes show no reliable link (r = −0.09).
Forecasts vs actual
Fertility (TFR): past UN projections. The outcome was below the projection in 0 of 4 revisions (2012–2022) and above in 3; median gap +10%.
The UN 2012 projection expected this level (4.32) already around 2014: reality is 9 years behind it.
The UN 2017 projection expected this level (4.32) already around 2019: reality is 4 years behind it.
Fertility (TFR): UN 2024 projection (medium): 2050 — 3.00 (−31% vs 2023), 2100 — 2.15 (−50% vs 2023); low variant for 2100: 1.65.
Births: past UN projections. The outcome was below the projection in 0 of 4 revisions (2012–2022) and above in 4; median gap +13%.
The UN 2012 projection did not expect today's level (1.68M, 2023) before its horizon ended (2097).
The UN 2022 projection expected today's level (1.68M, 2023) only around 2031: reality is 8 years ahead of it.
Births: UN 2024 projection (medium): 2050 — 1.97M (+17% vs 2023), 2100 — 1.92M (+14% vs 2023); low variant for 2100: 949k.
Population: past UN projections. The outcome was below the projection in 0 of 5 revisions (2012–2022) and above in 5; median gap +5.2%.
The UN 2012 projection expected today's level (50M, 2023) only around 2026: reality is 3 years ahead of it.
The UN 2022 projection expected today's level (50M, 2023) only around 2025: reality is 2 years ahead of it.
Population: UN 2024 projection (medium): 2050 — 85.2M (+70% vs 2023), 2100 — 137M (×2.7 vs 2023); low variant for 2100: 97.1M.
GDP growth: IMF next-year forecasts (24 editions, 2007–2018). On average the outcome was 4.6 pp below the forecast; below it in 67% of cases; typical error ±5.7 pp. The biggest miss was for 2012: IMF, April 2011 expected 5.6%, the outcome was −17%.
GDP growth: latest IMF forecast (IMF, April 2026): 2020 — −3.6%, 2022 — −2.5%, 2031 — 4.5%.
Inflation: IMF next-year forecasts (36 editions, 2007–2024). On average the outcome was 37.3 pp above the forecast; below it in 8% of cases; typical error ±40.4 pp. The biggest miss was for 2021: IMF, April 2020 expected 91.1%, the outcome was 359.1%.
Inflation: latest IMF forecast (IMF, April 2026): 2026 — 75.1%, 2028 — 27.6%, 2031 — 12.5%.
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 2012
UN 2015
UN 2017
UN 2019
UN 2022
UN 2024, medium
Release
Target period
Horizon
Expected
Actual
Actual vs expected
UN 2012
2023
11 years
47.6M
50M
+5.2%
UN 2015
2023
8 years
48.5M
50M
+3.1%
UN 2017
2023
6 years
46.8M
50M
+7%
UN 2019
2023
4 years
47.1M
50M
+6.3%
UN 2022
2023
1 year
48.1M
50M
+4%
Births
births per year
Actual
UN 2012
UN 2015
UN 2017
UN 2019
UN 2022
UN 2024, medium
Release
Target period
Horizon
Expected
Actual
Actual vs expected
UN 2012
2015–2020
6 years
1.33M
1.52M
+14.2%
UN 2015
2015–2020
2 years
1.36M
1.52M
+12.4%
UN 2017
2015–2020
0 years
1.33M
1.52M
+14.5%
UN 2022
2023
1 year
1.57M
1.68M
+7.4%
Total fertility rate
children per woman
Actual
UN 2012
UN 2015
UN 2017
UN 2019
UN 2022
UN 2024, medium
Release
Target period
Horizon
Expected
Actual
Actual vs expected
UN 2012
2015–2020
6 years
4.12
4.72
+14.6%
UN 2015
2015–2020
2 years
4.13
4.72
+14.4%
UN 2017
2015–2020
0 years
4.43
4.72
+6.5%
UN 2022
2023
1 year
4.32
4.32
0%
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
24
−4.6 pp
5.7 pp
67%
Inflation
36
+37.3 pp
40.4 pp
8%
Unemployment rate
1
−0.5 pp
0.5 pp
100%
Government gross debt
20
+42.9 pp
51.6 pp
20%
All indicators
Demography
Population
50M persons, 1 July latest value, 2023
Population on 1 July. UN estimate to 2023, medium variant from 2024; past UN revisions for forecast checks.