In January 2000, the National Center on Health Statistics (NCHS) released this report. The 48-page "Trends in Pregnancies and Pregnancy Rates by Outcome" study shows a decline in pregnancy rates between 1990 and 1996 with rates in 1996 being at their lowest in twenty years. The sharpest decline was among teenagers, "with the teen pregnancy rate falling by fifteen percent from its record high in 1991." Abortion rates were also down sixteen percent, making up twenty-two percent of pregnancy outcomes in 1996.