The report includes figures from over 99 percent of birth certificates filed in the U.S. and reveals that between 2004 and 2005, the birth rate for teenagers aged 15-19 fell 2 percent, to 40.4 births per 1,000 - a 35 percent decrease from the peak of 61.8 births per 1,000 in 1991. The decline was especially pronounced for non-Hispanic black teenagers 15-17 - the birth rate for this group fell 6 percent in 2005 compared with 2004 and 59 percent since 1991. In total, there were 421,123 births to females under age 20 in 2005. There was another increase in unmarried childbearing in 2005. The number of births to unmarried mothers of all ages rose 4 percent from 1.47 million in 2004 to 1.52 million in 2005; while the rate increased to 47.6 births per 1,000 unmarried females aged 15-44 in 2005, up from 46.1 in 2004. The percentage of births to unmarried mothers also increased in 2005, from 35.8 to 36.8 percent.