I've been single most of my life, and I have never been married. That doesn't sound very uncommon, but I am 39 years old. Now, if the current persists, I will be the only man left alive.
The following is an exerpt from the UN's World Population Analysis and Press Release.
http://www.un.org/ageing/prkit/factsnfigures.htm
· Sex ratio - The majority of older persons are women. Because life expectancy is greater for women than for men, today there are 81 older men per 100 older women. Among the oldest old there are only 53 men for every 100 women. The ratio of men to women at older ages is lower in the more developed regions (71 men per 100 women) than in the less developed regions (88 men per 100 women), since there are larger differences in life expectancy between the sexes in the more developed regions.