Datentabelle
| 1956 | 55,6 Mio. | 1976 | 945 Mio. | 1995 | 958 Mio. |
| 1957 | 48,3 Mio. | 1977 | 998 Mio. | 1996 | 995 Mio. |
| 1958 | 81 Mio. | 1978 | 1,21 Mrd. | 1997 | 1,05 Mrd. |
| 1959 | 83 Mio. | 1979 | 1,58 Mrd. | 1998 | 1,1 Mrd. |
| 1960 | 90,2 Mio. | 1980 | 2,25 Mrd. | 1999 | 1,13 Mrd. |
| 1961 | 90,2 Mio. | 1981 | 2,44 Mrd. | 2000 | 897 Mio. |
| 1962 | 150 Mio. | 1982 | 2,73 Mrd. | 2001 | 1,02 Mrd. |
| 1964 | 112 Mio. | 1983 | 2,73 Mrd. | 2002 | 1,1 Mrd. |
| 1965 | 118 Mio. | 1984 | 3,39 Mrd. | 2003 | 1,44 Mrd. |
| 1966 | 102 Mio. | 1985 | 3,51 Mrd. | 2004 | 1,39 Mrd. |
| 1967 | 119 Mio. | 1986 | 3,68 Mrd. | 2005 | 1,45 Mrd. |
| 1968 | 190 Mio. | 1987 | 3,65 Mrd. | 2006 | 1,44 Mrd. |
| 1969 | 195 Mio. | 1988 | 3,72 Mrd. | 2007 | 1,6 Mrd. |
| 1970 | 200 Mio. | 1989 | 1,48 Mrd. | 2008 | 1,73 Mrd. |
| 1971 | 177 Mio. | 1990 | 1,64 Mrd. | 2009 | 2,18 Mrd. |
| 1972 | 260 Mio. | 1991 | 2,89 Mrd. | 2010 | 2,35 Mrd. |
| 1973 | 389 Mio. | 1992 | 2,98 Mrd. | 2011 | 2,49 Mrd. |
| 1974 | 537 Mio. | 1993 | 1,43 Mrd. | | |
| 1975 | 888 Mio. | 1994 | 1,64 Mrd. | | |
Datentabelle
| 1960 | 10,5% | 1978 | 14,7% | 1995 | 6,9% |
| 1961 | 9,5% | 1979 | 15,9% | 1996 | 6% |
| 1962 | 13,5% | 1980 | 17,2% | 1997 | 5,9% |
| 1964 | 8,6% | 1981 | 14,5% | 1998 | 5,8% |
| 1965 | 8,9% | 1982 | 15,6% | 1999 | 5,8% |
| 1966 | 7,7% | 1983 | 14,6% | 2000 | 5,5% |
| 1967 | 8,2% | 1984 | 17,7% | 2001 | 5,5% |
| 1968 | 12,2% | 1985 | 16,6% | 2002 | 5,4% |
| 1969 | 10,8% | 1986 | 14,4% | 2003 | 6,2% |
| 1970 | 11,2% | 1987 | 11,2% | 2004 | 5,5% |
| 1971 | 8,4% | 1988 | 7,9% | 2005 | 5% |
| 1972 | 10,8% | 1989 | 8% | 2006 | 4,4% |
| 1973 | 15,1% | 1990 | 6,9% | 2007 | 4,1% |
| 1974 | 12,7% | 1991 | 10,4% | 2008 | 3,6% |
| 1975 | 15,9% | 1992 | 9% | 2009 | 4% |
| 1976 | 14,7% | 1993 | 7,2% | 2010 | 4,1% |
| 1977 | 14,5% | 1994 | 7,4% | | |