In 2000, 83.6 in 1,000 women aged 15-19 became pregnant-a 28% decline from 1990, when the teenage pregnancy rate reached a high of 116.9 per 1,000 women. Declines also took place among all racial and ethnic groups and in every state in 2000, according to this data from The Alan Guttmacher Institute. The teenage birth and abortion rates also declined between 1990 and 2000. Previous research suggests that both declines in sexual activity and increased use of more effective contraceptives are responsible for the continued declines in teenage pregnancy. An analysis by researchers at The Alan Guttmacher Institute found that about 25% of the decline in teenage pregnancy between 1988 and 1995 was due to decreased sexual activity, while 75% was due to more effective contraceptive practice.