According to the U.S. Census Bureau, one-half of first marriages end in divorce. The number of women living alone has doubled to 14.6 million, and the number has nearly tripled for men, jumping from 3.5 million to 10.3 million. This data would suggest that there are plenty of single people out there available for dating. But the older we get, the less we date: only 25% of 32-year-olds go out on a date at least once a week.