| Années | Nombres d'actes | |
|---|---|---|
| 1971 | 1 |
|
| 1972 | 0 | |
| 1973 | 2 |
|
| 1974 | 2 |
|
| ... | ||
| 4 années | ||
| ... | ||
| 1979 | 2 |
|
| 1980 | 0 | |
| 1981 | 2 |
|
| 1982 | 0 | |
| 1983 | 2 |
|
| 1984 | 1 |
|
| ... | ||
| 4 années | ||
| ... | ||
| 1989 | 1 |
|
| 1990 | 1 |
|
| 1991 | 2 |
|
| 1992 | 2 |
|
| 1993 | 2 |
|
| 1994 | 0 | |
| 1995 | 0 | |
| 1996 | 1 |
|
| ... | ||
| 3 années | ||
| ... | ||
| 2000 | 3 |
|
| 2001 | 1 |
|
| 2002 | 0 | |
| 2003 | 0 | |
| 2004 | 1 |
|
| 2005 | 2 |
|
| 2006 | 0 | |
| 2007 | 0 | |
| 2008 | 1 |
|
| 2009 | 2 |