This proportion will decline to 54 percent in 2050, the bureau said.

Yet the proportion of blacks going on to college declined from 48 to 38 percent.

The proportion of male black supervisors has declined since 1990.

Since the late 1980's, the proportion of Americans receiving health insurance through their jobs has declined.

During that time the proportion of black inmates declined from 90 to 70 percent.

By 1990, the proportion of black families in this category had declined to 14.1 percent.

The proportion of poor people has declined substantially in recent years.

By 1990 the proportion of married couples had declined to about 56 percent.

Does this mean that the proportion has declined in the last three years?

"The proportion of minorities in the schools has declined nearly 25 percent since 1997."