In general, the population is thought to have declined over time.

Population growth is expected to decline over the next 20 years.

Each time, the market declined over the next 13 weeks.

It has declined by over 80% in the past 21 years.

That average has declined to 174 over the last four years.

Pain declined 26% in the drug group over the study.

The building's condition has been declining over the past few years.

During the first nine months of 1999, sales declined by 18 percent over the same period in 1998, to $491.4 million.

But she added that they would probably decline slowly over the next four years.

It slowly declined over the course of the 20th century.