In 2nd half of 20th century it however started to decline significantly.

If reading were to decline significantly, it would change the very nature of our species.

The company's stock price had also declined significantly during that time.

Its range has declined significantly and is currently an area of just 16 km2.

The white population declined significantly until only 6,000 remained after June 1793.

At the same time, the deer population seems to have declined significantly.

The condition of the hotel had declined significantly by the 1990s.

By the 1970s, use of the Subway had declined significantly.

Moreover, the rate of increase in national health spending has declined significantly.

The heavy industry sector has declined significantly over the past 25 years.