Between 1992 to 1995 and 2002 to 2005, the overall annual rates of depression in this group doubled from 3.2 percent to 6.3 percent.

In South Carolina, the rate also nearly doubled, to 35 percent from 19 percent.

Those increases doubled the overnight rate, from 3 percent to 6 percent.

The number of people willing to pay an extra 15 percent almost doubled, from 27 percent, just a year ago, the company reported.

Use of marijuana by eighth graders more than doubled between 1991 and 1994, from 6.2 percent to 13 percent.

For example, the industry has doubled its share of international revenue from 13 percent in 1995 to 26 percent in 2008.

The plan calls for savings institutions to double their capital ratios by June 1991 to 6 percent of assets, from 3 percent.

The proportion of families earning above $150,000 a year more than doubled between 1990 and 1997, from 4.5 percent to 11.6 percent.

Among nonwhite children, the figure nearly doubled, to 9.7 percent, from 5.4 percent.

The share of Madison's black students reading at the top levels had doubled to 64 percent in 2004 from 31 percent six years earlier.