Shipments of limestone and gypsum from U.S. and Canadian Great Lakes ports in June totaled 4,738,186 net tons, an increase that equals three cargos in a mid-sized self-unloader. For the season, the stone trade stands at 12,969,557 net tons, an increase of 1.8 percent.
June 2000 | June 1999 | Season-To-Date 2000 | Season-To-Date 1999 | |
| U.S. Ports | 3,877,669 | 3,897,232 | 10,542,951 | 10,593,626 |
| Canadian Ports | 860,517 | 766,449 | 2,426,606 | 2,150,555 |
Total | 4,738,186 | 4,663,681 | 12,969,557 | 12,744,181 |