Datentabelle
| 1985 | 70,9% | 1999 | 25,9% | 2013 | 43,9% |
| 1986 | 46,5% | 2000 | 44,4% | 2014 | 35,3% |
| 1987 | 33,7% | 2001 | 38,1% | 2015 | 25,6% |
| 1988 | 33,5% | 2002 | 36,8% | 2016 | 23,1% |
| 1989 | 31,5% | 2003 | 38,9% | 2017 | 22,7% |
| 1990 | 30,3% | 2004 | 41,7% | 2018 | 30% |
| 1991 | 29,6% | 2005 | 45,1% | 2019 | 28% |
| 1992 | 25,8% | 2006 | 47,8% | 2020 | 16,6% |
| 1993 | 25,2% | 2007 | 32,4% | 2021 | 21,7% |
| 1994 | 24,5% | 2008 | 63,3% | 2022 | 25,9% |
| 1995 | 24,2% | 2009 | 38,4% | 2023 | 21,5% |
| 1996 | 28,2% | 2010 | 36,8% | 2024 | 17,4% |
| 1997 | 27,2% | 2011 | 51,5% | 2025 | 16,5% |
| 1998 | 21,4% | 2012 | 50,7% | 2026 | 18,4% |
Datentabelle
| 1980 | 6,27 Mrd. | 1996 | 2,86 Mrd. | 2012 | 12,1 Mrd. |
| 1981 | 8,46 Mrd. | 1997 | 2,84 Mrd. | 2013 | 9,93 Mrd. |
| 1982 | 7,87 Mrd. | 1998 | 1,92 Mrd. | 2014 | 7,64 Mrd. |
| 1983 | 7,75 Mrd. | 1999 | 2,54 Mrd. | 2015 | 4,55 Mrd. |
| 1984 | 7,35 Mrd. | 2000 | 5,08 Mrd. | 2016 | 3,64 Mrd. |
| 1985 | 7,53 Mrd. | 2001 | 4,23 Mrd. | 2017 | 3,81 Mrd. |
| 1986 | 3,33 Mrd. | 2002 | 4,27 Mrd. | 2018 | 5,49 Mrd. |
| 1987 | 2,75 Mrd. | 2003 | 4,93 Mrd. | 2019 | 5,14 Mrd. |
| 1988 | 2,49 Mrd. | 2004 | 6,15 Mrd. | 2020 | 2,75 Mrd. |
| 1989 | 2,53 Mrd. | 2005 | 7,92 Mrd. | 2021 | 4,09 Mrd. |
| 1990 | 2,71 Mrd. | 2006 | 9,65 Mrd. | 2022 | 5,95 Mrd. |
| 1991 | 2,69 Mrd. | 2007 | 6,64 Mrd. | 2023 | 4,36 Mrd. |
| 1992 | 2,33 Mrd. | 2008 | 14,3 Mrd. | 2024 | 3,57 Mrd. |
| 1993 | 2,27 Mrd. | 2009 | 6,65 Mrd. | 2025 | 3,45 Mrd. |
| 1994 | 2,25 Mrd. | 2010 | 6,87 Mrd. | 2026 | 4 Mrd. |
| 1995 | 2,45 Mrd. | 2011 | 12 Mrd. | | |
Datentabelle
| 1985 | 40,6% | 1999 | 44,1% | 2013 | 33,4% |
| 1986 | 40% | 2000 | 37,5% | 2014 | 34% |
| 1987 | 30,3% | 2001 | 35,5% | 2015 | 37% |
| 1988 | 36,6% | 2002 | 41,4% | 2016 | 39,8% |
| 1989 | 36,2% | 2003 | 30,9% | 2017 | 36,6% |
| 1990 | 32% | 2004 | 33,2% | 2018 | 32,9% |
| 1991 | 30,6% | 2005 | 29,1% | 2019 | 32,1% |
| 1992 | 34,1% | 2006 | 28% | 2020 | 32,8% |
| 1993 | 38% | 2007 | 29,3% | 2021 | 30,1% |
| 1994 | 47,1% | 2008 | 27,2% | 2022 | 26,1% |
| 1995 | 44% | 2009 | 34,8% | 2023 | 30,1% |
| 1996 | 36,9% | 2010 | 25,5% | 2024 | 30,3% |
| 1997 | 39% | 2011 | 29,9% | 2025 | 29,9% |
| 1998 | 45,4% | 2012 | 31,1% | 2026 | 29,1% |
Datentabelle
| 1980 | 1,14 Mrd. | 1996 | 3,74 Mrd. | 2012 | 7,41 Mrd. |
| 1981 | 1,38 Mrd. | 1997 | 4,08 Mrd. | 2013 | 7,57 Mrd. |
| 1982 | 2,17 Mrd. | 1998 | 4,07 Mrd. | 2014 | 7,37 Mrd. |
| 1983 | 5,63 Mrd. | 1999 | 4,32 Mrd. | 2015 | 6,58 Mrd. |
| 1984 | 4,14 Mrd. | 2000 | 4,3 Mrd. | 2016 | 6,27 Mrd. |
| 1985 | 4,32 Mrd. | 2001 | 3,95 Mrd. | 2017 | 6,12 Mrd. |
| 1986 | 2,87 Mrd. | 2002 | 4,8 Mrd. | 2018 | 6,02 Mrd. |
| 1987 | 2,47 Mrd. | 2003 | 3,91 Mrd. | 2019 | 5,91 Mrd. |
| 1988 | 2,71 Mrd. | 2004 | 4,89 Mrd. | 2020 | 5,44 Mrd. |
| 1989 | 2,9 Mrd. | 2005 | 5,11 Mrd. | 2021 | 5,66 Mrd. |
| 1990 | 2,85 Mrd. | 2006 | 5,65 Mrd. | 2022 | 6,01 Mrd. |
| 1991 | 2,78 Mrd. | 2007 | 6 Mrd. | 2023 | 6,11 Mrd. |
| 1992 | 3,07 Mrd. | 2008 | 6,14 Mrd. | 2024 | 6,21 Mrd. |
| 1993 | 3,43 Mrd. | 2009 | 6,03 Mrd. | 2025 | 6,24 Mrd. |
| 1994 | 4,31 Mrd. | 2010 | 4,76 Mrd. | 2026 | 6,34 Mrd. |
| 1995 | 4,46 Mrd. | 2011 | 6,97 Mrd. | | |