If rates jump only one percentage point, the cost will rise another $15 billion, the study found.

And the rate of immigration has jumped in recent years.

The rate jumped to 38.3 percent for students who started in 1999.

The white rate jumped to 126 arrests per 100,000 whites under the age of 18, from 82.

Manufacturers' rate of return on capital has jumped from 2% to 10%.

The last time rates jumped to such levels was in June 1991, when they hit 12.8 percent.

For women who are 25 to 29, the rate jumps slightly to 7.5 cases out of 100,000.

In the case of national stories, the rate jumped nationally.

Since just 1990, that rate has jumped to 75 percent.

Among children from 9 to 11, the rate jumps to about 45 percent.