| Year | Total | vs prev |
|---|---|---|
| 2020 | 0 | −100.0% |
| 2019 | 3 | +50.0% |
| 2018 | 2 | — |
| 2017 | 2 | — |
| 2016 | 2 | — |
| 2004 | 0 | −100.0% |
| 2003 | 2 | −33.3% |
| 2002 | 3 | −25.0% |
| 2001 | 4 | −33.3% |
| 2000 | 6 | +20.0% |
| 1999 | 5 | −16.7% |
| 1998 | 6 | −25.0% |
| 1997 | 8 | −33.3% |
| 1996 | 12 | +9.1% |
| 1995 | 11 | — |
| 1994 | 11 | −15.4% |
| 1993 | 13 | −51.9% |
| 1992 | 27 | −6.9% |
| 1991 | 29 | — |