| Années | Nombres d'actes |
|---|---|
| 1970 | 21 |
| 1971 | 74 |
| 1972 | 147 |
| 1973 | 151 |
| 1974 | 169 |
| 1975 | 155 |
| 1976 | 197 |
| 1977 | 182 |
| 1978 | 224 |
| 1979 | 240 |
| 1980 | 208 |
| 1981 | 251 |
| 1982 | 229 |
| 1983 | 272 |
| 1984 | 266 |
| 1985 | 276 |
| 1986 | 266 |
| 1987 | 299 |
| 1988 | 256 |
| 1989 | 281 |
| 1990 | 331 |
| 1991 | 305 |
| 1992 | 339 |
| 1993 | 352 |
| 1994 | 315 |
| 1995 | 400 |
| 1996 | 389 |
| 1997 | 372 |
| 1998 | 374 |
| 1999 | 557 |
| 2000 | 415 |
| 2001 | 386 |
| 2002 | 412 |
| 2003 | 420 |
| 2004 | 417 |
| 2005 | 432 |
| 2006 | 376 |
| 2007 | 415 |
| 2008 | 421 |
| 2009 | 405 |