| Location | Month | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | Total |
|---|---|---|---|---|---|---|---|---|
| HAVO1 | 1 | 0.0% | 37.5% | 23.1% | ||||
| HAVO1 | 2 | 55.6% | 10.0% | 31.6% | ||||
| HAVO1 | 3 | 37.5% | 20.0% | 27.8% | ||||
| HAVO1 | 4 | 0.0% | 40.0% | 20.0% | ||||
| HAVO1 | 5 | 12.5% | 30.0% | 22.2% | ||||
| HAVO1 | 6 | 0.0% | 0.0% | 0.0% | ||||
| HAVO1 | 7 | 22.2% | 0.0% | 10.0% | ||||
| HAVO1 | 8 | 20.0% | 10.0% | 15.0% | ||||
| HAVO1 | 9 | 11.1% | 20.0% | 15.8% | ||||
| HAVO1 | 10 | 9.1% | 20.0% | 14.3% | ||||
| HAVO1 | 11 | 30.0% | 30.0% | 30.0% | ||||
| HAVO1 | 12 | 30.0% | 30.0% | 30.0% |