| Year | Total Horses Registered (1) | Foreign-breds Registered (2) | (2) / (1) (%) |
| 1990 | 6,045 | 92 | 1.52% |
| 1991 | 6,074 | 114 | 1.88% |
| 1992 | 6,112 | 126 | 2.06% |
| 1993 | 6,186 | 180 | 2.91% |
| 1994 | 6,296 | 329 | 5.23% |
| 1995 | 6,409 | 490 | 7.65% |
| 1996 | 6,383 | 653 | 10.23% |
| 1997 | 6,430 | 806 | 12.53% |
| 1998 | 6,298 | 820 | 13.02% |
| 1999 | 6,597 | 745 | 11.29% |
| 2000 | 7,303 | 767 | 10.50% |
| 2001 | 7,715 | 778 | 10.08% |