Drug use in high school has declined by 11 percent over the last two years.

But its number has declined by 60 percent since 1955.

And in 1990, it is likely to have declined by 1.5 percent.

Production declined by 13 percent in the first six months of the year.

It had declined by 19 percent from 1970 to 1980.

This type of use declined by about 4 percent from 1980 to 1995.

Since then it has declined by just over 26 percent.

Those numbers have declined by about 6 percent a year.

Between 2000 and 2010 the total population declined by 30 percent.

Since 2001, the budget has declined by more than 37 percent.