From the 2006 National Survey of Family Growth:
What is your current marital status? Are you:
The last time you had intercourse, did you or your partner use any method?
The original baseline and baseline year were revised from 34.5 to 35.1 and from 2006-08 to 2006-10, respectively. The target was adjusted from 38.0 to 38.6 to reflect the revised baseline using the original target-setting method.