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| 1988 | 24% | 2001 | 27,3% | 2014 | 21,8% |
| 1989 | 31,6% | 2002 | 29,5% | 2015 | 14,9% |
| 1990 | 35,8% | 2003 | 32,3% | 2016 | 11,2% |
| 1991 | 31,6% | 2004 | 34,4% | 2017 | 8,5% |
| 1992 | 24,3% | 2005 | 37,6% | 2018 | 6,9% |
| 1993 | 24,7% | 2006 | 37,7% | 2019 | 10,1% |
| 1994 | 31% | 2007 | 33,1% | 2020 | 4,5% |
| 1995 | 27% | 2008 | 31,4% | 2021 | 7,3% |
| 1996 | 35,7% | 2009 | 24,6% | 2022 | 9,8% |
| 1997 | 33,6% | 2010 | 26,4% | 2023 | 11,9% |
| 1998 | 24,3% | 2011 | 31,1% | 2024 | 13,8% |
| 1999 | 26,8% | 2012 | 28,2% | 2025 | 14,5% |
| 2000 | 32,7% | 2013 | 26,1% | | |
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| 2018 | 0 M | 2021 | 13,5 mil M | 2024 | 687 mil M |
| 2019 | 101 M | 2022 | 61,2 mil M | 2025 | 2,38 bill. |
| 2020 | 635 M | 2023 | 359 mil M | | |
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| 1988 | 33,2% | 2001 | 31,9% | 2014 | 31,6% |
| 1989 | 32,5% | 2002 | 31% | 2015 | 22,9% |
| 1990 | 31,9% | 2003 | 32,2% | 2016 | 19,7% |
| 1991 | 33,9% | 2004 | 31,9% | 2017 | 21,8% |
| 1992 | 30,6% | 2005 | 33,5% | 2018 | 37,9% |
| 1993 | 27,7% | 2006 | 39,3% | 2019 | 21% |
| 1994 | 42,2% | 2007 | 35,9% | 2020 | 11,2% |
| 1995 | 32,9% | 2008 | 34,9% | 2021 | 13,1% |
| 1996 | 27,7% | 2009 | 33,3% | 2022 | 15,1% |
| 1997 | 31% | 2010 | 31,1% | 2023 | 13,1% |
| 1998 | 28,8% | 2011 | 39,4% | 2024 | 17,5% |
| 1999 | 26,1% | 2012 | 38% | 2025 | 20,3% |
| 2000 | 28,3% | 2013 | 36,5% | | |
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| 2017 | 0 M | 2020 | 1,56 mil M | 2023 | 397 mil M |
| 2018 | 2 M | 2021 | 24,3 mil M | 2024 | 869 mil M |
| 2019 | 211 M | 2022 | 94,1 mil M | 2025 | 3,35 bill. |