Teens and young adults are more likely to be abstinent
Since 2002, the percent of teens and young adults who have abstained from any form of sexual activity increased. While all age groups became more abstinent, the gains were particularly significant among late teenage girls and men and women in their early 20s.
Total abstinence among teens and young adults

Source: Centers for Disease Control and Prevention, National Survey of Family Growth, 2002 and 2006–2008.