Changes in contraceptive method use are shown by comparing the 1995 and 2006–2010 NSFG surveys. The 1995 NSFG was a periodic survey designed to interview a large number of women within a short period of time, between January and October 1995; the 2006–2010 NSFG was designed to continuously interview smaller numbers of women for a longer period, between June 2006 and June 2010 (2,3). These two surveys contain the largest samples of women in the NSFG’s history— 10,847 in 1995 and 12,279 in 2006– 2010, allowing detailed comparisons that were not possible in previous reports (4,5).