| Années | Nombres d'actes |
|---|---|
| 1970 | 2 |
| 1971 | 26 |
| 1972 | 32 |
| 1973 | 41 |
| 1974 | 44 |
| 1975 | 51 |
| 1976 | 46 |
| 1977 | 56 |
| 1978 | 78 |
| 1979 | 81 |
| 1980 | 81 |
| 1981 | 74 |
| 1982 | 91 |
| 1983 | 104 |
| 1984 | 103 |
| 1985 | 106 |
| 1986 | 86 |
| 1987 | 103 |
| 1988 | 86 |
| 1989 | 82 |
| 1990 | 85 |
| 1991 | 92 |
| 1992 | 113 |
| 1993 | 110 |
| 1994 | 133 |
| 1995 | 105 |
| 1996 | 119 |
| 1997 | 159 |
| 1998 | 127 |
| 1999 | 170 |
| 2000 | 131 |
| 2001 | 128 |
| 2002 | 143 |
| 2003 | 149 |
| 2004 | 106 |
| 2005 | 107 |
| 2006 | 127 |
| 2007 | 109 |
| 2008 | 132 |
| 2009 | 87 |