But couples are very reluctant to divorce when they have children, and so single-parent households account for exactly the same proportion today as in 1965.

The 2 million households of unmarried couples account for 4 percent of all couples.

Individual households account for 9.5% of the total.

Higher-income households account for a significant portion of individual giving.

If you can't decide, maybe both make sense: the association says that two-grill households accounted for much of the increase in last year's sales.

Indeed, 6.3 million households trade stocks over the Internet, and they account for one in every seven stock trades in the country.

But middle-income households accounted for most of the increase in the number of uninsured.

The richest households accounted for 37 percent of private net worth in 1989, up from 31 percent in 1983.

These wealthy households accounted for only 111,000 of the 120 million income tax returns filed in 1996, the latest year for which complete figures are available.