The number of drivers per race is usually between 20 and 30 cars.

The company has reduced the number of drivers from 100 to 84.

By 1983 the number of drivers in that category had increased to 1.4 million.

We will just have to double the number of drivers.

The number of drivers required to compete in each race.

The number of drivers in that age group who were killed or injured did not change, however.

Whatever the wheels, a growing number of young drivers have their own.

The number of drivers picked up so far this year is not yet available.

The number of drivers over 70 will triple in the next 20 years.

The number of drivers has also risen, but only by 72 percent.