Because before 1980, there were much fewer people born than there were during the last 30 years.
Avant 1980, il y avait beaucoup moins de naissances qu'au cours des 30 dernières années.
Because before 1980, there were much fewer people born than there were during the last 30 years.
Avant 1980, il y avait beaucoup moins de naissances qu'au cours des 30 dernières années.