|
| Années | Valeurs | Variations (%) ** |
| 1970 | 0,61 |
|
| 1971 | 0,73 |
19,67 |
| 1972 | 1,60 |
119,18 |
| 1973 | 4,07 |
154,38 |
| 1974 | 8,64 |
112,29 |
| 1975 | 6,69 |
-22,57 |
| 1976 | 6,98 |
4,33 |
| 1977 | 4,97 |
-28,80 |
| 1978 | 5,51 |
10,87 |
| 1979 | 12,01 |
117,97 |
| 1980 | 11,36 |
-5,41 |
| 1981 | 8,08 |
-28,87 |
| 1982 | 6,04 |
-25,25 |
| 1983 | 9,54 |
57,95 |
| 1984 | 10,07 |
5,56 |
| 1985 | 10,37 |
2,98 |
| 1986 | 5,82 |
-43,88 |
| 1987 | 6,38 |
9,62 |
| 1988 | 8,42 |
31,97 |
| 1989 | 10,48 |
24,47 |
| 1990 | 13,19 |
25,86 |
| 1991 | 7,32 |
-44,50 |
| 1992 | 7,95 |
8,61 |
| 1993 | 7,39 |
-7,04 |
| 1994 | 6,68 |
-9,61 |
| 1995 | 7,36 |
10,18 |
| 1996 | 8,93 |
21,33 |
| 1997 | 7,01 |
-21,50 |
| 1998 | 3,87 |
-44,79 |
| 1999 | 7,98 |
106,20 |
| 2000 | 16,28 |
104,01 |
| 2001 | 9,26 |
-43,12 |
| 2002 | 8,17 |
-11,77 |
| 2003 | 9,05 |
10,77 |
| 2004 | 13,32 |
47,18 |
| 2005 | 17,74 |
33,18 |
| 2006 | 18,83 |
6,14 |
| 2007 | 16,94 |
-10,04 |
| 2008 | 18,74 |
10,63 |
| 2009 | 9,22 |
-50,80 |
| 2010 | 11,80 |
27,98 |
| 2011 | 16,26 |
37,80 |
| 2012 | 14,44 |
-11,19 |
| 2013 | 13,25 |
-8,24 |
| 2014 | 11,66 |
-12,00 |
| 2015 | 4,89 |
-58,06 |
| 2016 | 3,75 |
-23,31 |
| 2017 | 5,51 |
46,93 |
|
