The immigration rate was particularly high during the 1920s and 1930s.

In addition to having an effect on extinction, island size can also affect immigration rates.

If there were jobs, the present Soviet immigration rate of about 10,000 a month could double.

The growing immigration rate (over 45% in 2007) has boosted its population to 18,000 inhabitants.

The immigration rate in the province is about 25%.

Texas from 2000-2006 had the fastest growing illegal immigration rate in the nation.

Australia has one of the highest immigration rates in the world.

Hispanic people, for example, have high birthrates and immigration rates, the study showed.

When the opportunity cost is lower, the immigration rates tend to be higher.

It cited high fertility and immigration rates among Hispanic people.