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Table 1 Data from the 25–29 age group in Japan over the time frame 1950 to 2010

From: Marital fertility patterns and nonmarital birth ratios: an integrated approach

Year ΔASFR/ASFR ΔrW/rW ΔW/W ΔrW/rW + ΔW/W
1960 − 0.23 − 0.21 − 0.03 − 0.24
1970 0.15 0.09 0.05 0.14
1980 − 0.13 − 0.06 − 0.07 − 0.13
1990 − 0.23 − 0.01 − 0.22 − 0.23
1995 − 0.17 − 0.03 − 0.14 − 0.17
2000 − 0.14 − 0.02 − 0.13 − 0.14
2005 − 0.14 − 0.02 − 0.12 − 0.14
2010 0.02 0.06 − 0.03 0.03
  1. Legend: Eq. 12 demonstrated for Japanese women ages 25–29 from 1950 to 2010. National Institute of Population and Social Security Research (NIPSSR) (2012)