In 30 to 35 percent of patients, no cause can be found.

He had been in the top ten percent of their law school class.

These were in the bottom 5 percent among those who took the test.

Even there, I was in the top 20 percent of my class.

But this will go down in the top 10 percent.

It is now present in about 70 percent of the world's population.

However, in about 60 percent of cases, a positive family history is not found.

In more than 80 percent of the cases, drugs played a role.

He finished in the top five 45 percent of the time.

But if you do, you're in the top 1 percent.