|
| Années | Valeurs | Variations (%) ** |
| 1961 | 162 |
|
| 1962 | 352 |
117,28 |
| 1963 | 301 |
-14,49 |
| 1964 | 228 |
-24,25 |
| 1965 | 243 |
6,58 |
| 1966 | 185 |
-23,87 |
| 1967 | 154 |
-16,76 |
| 1968 | 78 |
-49,35 |
| 1969 | 127 |
62,82 |
| 1970 | 106 |
-16,54 |
| 1971 | 83 |
-21,70 |
| 1972 | 58 |
-30,12 |
| 1973 | 50 |
-13,79 |
| 1974 | 54 |
8,00 |
| 1975 | 55 |
1,85 |
| 1976 | 58 |
5,45 |
| 1977 | 61 |
5,17 |
| 1978 | 47 |
-22,95 |
| 1979 | 83 |
76,60 |
| 1980 | 65 |
-21,69 |
| 1981 | 75 |
15,38 |
| 1982 | 30 |
-60,00 |
| 1983 | 35 |
16,67 |
| 1984 | 40 |
14,29 |
| 1985 | 36 |
-10,00 |
| 1986 | 100 |
177,78 |
| 1987 | 27 |
-73,00 |
| 1988 | 18 |
-33,33 |
| 1989 | 20 |
11,11 |
| 1990 | 17 |
-15,00 |
| 1991 | 26 |
52,94 |
| 1992 | 21 |
-19,23 |
| 1993 | 30 |
42,86 |
| 1994 | 43 |
43,33 |
| 1995 | 25 |
-41,86 |
| 1996 | 22 |
-12,00 |
| 1997 | 14 |
-36,36 |
| 1998 | 12 |
-14,29 |
| 1999 | 9 |
-25,00 |
| 2000 | 7 |
-22,22 |
| 2001 | 8 |
14,29 |
| 2002 | 9 |
12,50 |
| 2003 | 8 |
-11,11 |
| 2004 | 9 |
12,50 |
| 2005 | 9 |
0,00 |
| 2006 | 10 |
11,11 |
| 2007 | 9 |
-10,00 |
| 2008 | 10 |
11,11 |
| 2009 | 11 |
10,00 |
| 2010 | 12 |
9,09 |
| 2011 | 15 |
25,00 |
| 2012 | 15 |
0,00 |
| 2013 | 15 |
0,00 |
|
