The number of such refugees has tripled in the last two years, the report said.

From 1900 to 1916 the total number of students tripled.

The number of people paid over $10,000 a year has tripled in six years.

Since 1980, the number of Americans in prison has tripled to 1.5 million.

By 1970 the number of members had more than tripled to 32,000.

Between 1980 and 1985 the number of computer science graduate students tripled.

The number of students tripled over the next ten years.

By the next year, the number had tripled and has grown to more than 700 today.

By the following year, the number had tripled and has grown to over 700 today.

The number of Hispanic people nearly tripled since 1980, to 171.