And by the end of the second year, 95 percent, an estimated 120,000 people, must be participating.

About 50 to 60 percent of his students have participated in the dig.

Even in companies where such programs were offered, 32 percent of employees did not participate.

University officials said that 82 percent of the high schools in the state were participating.

The leaders said 90 percent of the airport employees were participating in the strike.

But less than 3 percent of adults with cancer participate in such tests, he said.

More than 80 percent of students participate in extracurricular programs.

About 95 percent of the nation's 17,000 nursing homes participate in those programs.

More than 20 percent of students participate in a varsity sport.

"I think it's safe to say that about 70 percent of the schools will participate," he said.