Another major factor was abortion, only available in a few states until its legalization in a 1973 US Supreme Court decision in "Roe v. Wade." This was replicated elsewhere, with reproductive rights legislation passed, notably in the UK (1967), France (1975), West Germany (1976), New Zealand (1977), Italy (1978), and the Netherlands (1980). From 1973 to 1980, the abortion rate per 1,000 US women aged 15–44 increased exponentially from 16% to 29% with more than 9.6 million terminations of pregnancy practiced. Between 1970 and 1980, on average, for every 10 American citizens born, 3 were aborted. However, increased immigration during the same period of time helped to partially offset declining birth-rates and contributed to making Generation X an ethnically and culturally diverse demographic cohort.