In the USA, approximately 22.6 million people live alone and increase of 100% in the ten years since 1970. People living alone reflect an expanding elderly population, with many more widows living alone, later marriage, more divorce, greater financial independence for women and the availability of more housing units. In 1993 it was estimate that half the flats in Paris were inhabited by people living alone. In 1994 in the UK a survey indicated that a quarter of all men were single, with 11% living entirely alone, namely almost double the figure ten years previously, and three times that in 1963.