The following data correlates the number of pre-marital sexual partners of the sample group against the percentage who subsequently go on to an extra-marital affair.
Pre-Marital Partners
Number of Pre-Marital Partners	Percent Who Cheated Once Married
2	10.4%
3	14.9%
4	17.7%
5	21.6%
6-10	26.0%
11-20	36.7%
21+	46.8%
Source: NORC General Social Survey
Reproduced from www.statisticbrain.com