Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. |  |
VRS Castricum | 3 | 5 June 1986 | |
| 2. | |
VRS Castricum | 1 | 15 September 1979 | |
| 3. | |
VRS Castricum | 1 | 10 August 1980 | |
| 4. | |
VRS Castricum | 1 | 5 September 1981 | |
| 5. | |
VRS Castricum | 1 | 24 September 1984 | |
| 6. | |
VRS Castricum | 1 | 18 August 1987 | |
| 7. | |
VRS Castricum | 1 | 2 October 1988 | |
| 8. | |
VRS Castricum | 1 | 11 August 1990 | |
| 9. | |
VRS Castricum | 1 | 3 May 2006 | |
