The latest census survey, one taken every year, sampled 100,000 households. The findings illustrate how much demographics have shaped destiny. Not only have women by their 40s had fewer children than their parents, but an increasing proportion of married couples are older. In 1968, less than 30 percent of married men were 55 and older. Today nearly 40 percent are that age; the percentage of married women 55 and older has increased from 22 to 33 percent. Today, most families do not have young children at home, according to the U.S. Census Bureau. In the early 1960s, almost 60 percent of families had children younger than 18 living at home; that percentage has now dropped to 46 percent.
