| Années | Nombres d'actes | |
|---|---|---|
| 1973 | 1 |
|
| 1974 | 0 | |
| 1975 | 0 | |
| 1976 | 1 |
|
| ... | ||
| 3 années | ||
| ... | ||
| 1980 | 1 |
|
| 1981 | 1 |
|
| 1982 | 1 |
|
| 1983 | 0 | |
| 1984 | 1 |
|
| 1985 | 0 | |
| 1986 | 2 |
|
| ... | ||
| 4 années | ||
| ... | ||
| 1991 | 1 |
|
| 1992 | 2 |
|
| ... | ||
| 5 années | ||
| ... | ||
| 1998 | 1 |
|
| 1999 | 0 | |
| 2000 | 0 | |
| 2001 | 2 |
|
| 2002 | 0 | |
| 2003 | 2 |
|
| 2004 | 0 | |
| 2005 | 1 |
|
| 2006 | 0 | |
| 2007 | 1 |
|
| 2008 | 1 |
|
| 2009 | 0 | |
| 2010 | 1 |
|
| 2011 | 0 | |
| 2012 | 1 |
|
| 2013 | 1 |
|
| 2014 | 2 |
|
| 2015 | 1 |
|
| 2016 | 3 |
|
| 2017 | 2 |
|
| 2018 | 3 |