|
| Années | Valeurs | Variations (%) ** |
| 1960 | 18,45 |
|
| 1961 | 21,06 |
14,15 |
| 1962 | 22,88 |
8,64 |
| 1963 | 23,12 |
1,05 |
| 1964 | 24,62 |
6,49 |
| 1965 | 22,74 |
-7,64 |
| 1966 | 22,27 |
-2,07 |
| 1967 | 18,76 |
-15,76 |
| 1968 | 15,57 |
-17,00 |
| 1969 | 21,08 |
35,39 |
| 1970 | 20,84 |
-1,14 |
| 1971 | 20,45 |
-1,87 |
| 1972 | 19,80 |
-3,18 |
| 1973 | 23,13 |
16,82 |
| 1974 | 23,72 |
2,55 |
| 1975 | 28,15 |
18,68 |
| 1976 | 31,37 |
11,44 |
| 1977 | 28,53 |
-9,05 |
| 1978 | 31,25 |
9,53 |
| 1979 | 31,80 |
1,76 |
| 1980 | 29,21 |
-8,14 |
| 1981 | 27,06 |
-7,36 |
| 1982 | 20,39 |
-24,65 |
| 1983 | 24,29 |
19,13 |
| 1984 | 23,83 |
-1,89 |
| 1985 | 26,05 |
9,32 |
| 1986 | 34,70 |
33,21 |
| 1987 | 29,63 |
-14,61 |
| 1988 | 27,24 |
-8,07 |
| 1989 | 26,08 |
-4,26 |
| 1990 | 20,64 |
-20,86 |
| 1991 | 18,04 |
-12,60 |
| 1992 | 16,39 |
-9,15 |
| 1993 | 8,65 |
-47,22 |
| 1994 | 12,98 |
50,06 |
| 1995 | 10,00 |
-22,96 |
| 1996 | 10,00 |
0,00 |
| 1997 | 10,00 |
0,00 |
| 1998 | 10,00 |
0,00 |
| 1999 | 10,00 |
0,00 |
| 2000 | 23,77 |
137,70 |
| 2001 | 22,22 |
-6,52 |
| 2002 | 36,83 |
65,75 |
| 2003 | 22,20 |
-39,72 |
| 2006 | 10,00 |
-54,95 |
| 2007 | 30,00 |
200,00 |
| 2008 | 40,00 |
33,33 |
| 2009 | 35,00 |
-12,50 |
| 2010 | 32,00 |
-8,57 |
| 2011 | 30,00 |
-6,25 |
| 2012 | 31,00 |
3,33 |
|
