At the present, their population has dropped dramatically, down to 3 million tons.

And production has dropped - to 495 tons last year from 1,000 tons in 1970.

During the early 1970s, the catch dropped precipitously to just sixty tons.

Those figures had dropped to 275,000 hectares and 84,000 tons during the drought of 1986.

Since then, production has dropped to less than 20 million tons.

After that, the decline was more rapid, dropping to 33,329 tons by 1893.

The Russians said yesterday that their mine production dropped 8.5 percent last year, to 129.5 million metric tons.

By January 1973, those imports had dropped to 30,000 tons per month.

Production diminished in the early 1920s, dropping to less than 30,000 tons of coal a year.

By 1880, however it had dropped away to under 200,000 tons.