The fresh new gender proportion to own cohorts born about eighties and you can 90s is lower in new afterwards census, exhibiting the underreporting out of people births as well as the overestimation out of unique SRB. As well as rise above the crowd inside the Contour step one, the latest SRB to your eighties beginning cohorts intertwined the fresh involved gender ratios (aged 0–10) on the 1990 census investigation, more than new corresponding intercourse percentages (aged ten–20) on 2000 census studies, and far higher than that (aged 20–30) on 2010 census research.