Numbers fell substantially during the 20th century and especially after the 1960s.

Whatever the police did, crime fell substantially just about everywhere.

In 1997, the economy added 250,000 jobs a month, and the unemployment rate fell substantially.

The performance of most cities falls substantially below this standard.

The technology has since improved and the prices have fallen substantially.

But it is unlikely that the dollar will be allowed to fall substantially.

If prices were to fall substantially, there could be confrontation between oil firms and the government.

But its market share fell substantially, to 18.7 percent from 20 percent.

Each peaked in March and has fallen substantially since then.

In recent years, the rate of cavities among the nation's school children has fallen substantially.