File talk:Changes in premarital sex partners.PNG

Source? -- previously unsigned comment by 72.229.5.203

The source is the US NSFG (National Survey of Family Growth) from the years 2002, 2006-2010, and 2011-2013 for the contemporary estimates of the pre-marital partner count of American women, with the older data going back to the 70s collated here and separated by marriage cohort:https://ifstudies.org/blog/counterintuitive-trends-in-the-link-between-premarital-sex-and-marital-stability https://www.cdc.gov/nchs/nsfg/index.htm Altmark22 (talk)