Blank spaces = No data available
| 1996 | 1997 | 1998 | 1999 | 2000 | |
| JAN | |||||
| FEB | |||||
| MAR | |||||
| APR | 0.0 | ||||
| MAY | 0.0 | 55.7 | 0.0 | 2.7 | 0.0 |
| JUN | 40.9 | 2.7 | 0.0 | 16.8 | 63.4 |
| JUL | 56.1 | 91.0 | 130.3 | 251.2 | 31.2 |
| AUG | 78.9 | 189.0 | 67.6 | 95.3 | 37.0 |
| SEP | 123.3 | 64.3 | 26.1 | 91.6 | 9.6 |
| OCT | 4.8 | 116.4 | 0.3 | 133.2 | |
| NOV | 0.0 | 165.6 | 0.0 | ||
| DEC | |||||
| Total | 304.0 | 402.7 | 506.0 | 457.9 | 274.4 |