Of the 57 million American women 45 and up, nearly half—25 million—are unmarried (outnumbering entire populations of countries such as North Korea, Taiwan, and Australia). There are several reasons for this: American women marry later, their divorce rate is high, and, not to put too fine a point on it, those who are married are likely to outlive their mates. As a result, American women are now likely to spend more years of their lives single than with a significant other (Source: AARP)

Note from Tom Mann: Time to start a dating service?

Of all the elderly people living alone, the percentage of women will raise to 85% by 2020 (Source: AARP)