|
Ano |
% |
| 1974 | 25,10% |
| 1975 | 15,20% |
| 1976 | 20,00% |
| 1977 | 27,40% |
| 1978 | 22,00% |
| 1979 | 24,20% |
| 1980 | 16,60% |
| 1981 | 20,00% |
| 1982 | 22,40% |
| 1983 | 25,50% |
| 1984 | 29,30% |
| 1985 | 19,30% |
| 1986 | 11,70% |
| 1987 | 10,20% |
| 1988 | 9,60% |
| 1989 | 12,70% |
| 1990 | 13,60% |
| 1991 | 12,00% |
| 1992 | 9,50% |
| 1993 | 6,80% |
| 1994 | 5,40% |
| 1995 | 4,20% |
| 1996 | 3,10% |
| 1997 | 3,20% |
| 1998 | 2,80% |
| 1999 | 2,30% |
| 2000 | 2,90% |
| 2001 | 4,40% |
| 2002 | 3,60% |
| 2003 | 3,30% |
| 2004 | 2,40% |
| 2005 | 2,30% |
| 2006 | 3,10% |
| 2007 | 2,50% |
| 2008 | 2,60% |
| 2009 | -0,80% |
| 2010* | 0,10% |