Show data table
| 1981 | 19.1% | 1997 | 14.2% | 2013 | 16.9% |
| 1982 | 17.1% | 1998 | 13.2% | 2014 | 16.6% |
| 1983 | 17.6% | 1999 | 14.2% | 2015 | 14.9% |
| 1984 | 18.6% | 2000 | 13.4% | 2016 | 14.4% |
| 1985 | 17.7% | 2001 | 17.7% | 2017 | 14.2% |
| 1986 | 15.1% | 2002 | 16.4% | 2018 | 14.9% |
| 1987 | 14.6% | 2003 | 17.1% | 2019 | 14.3% |
| 1988 | 14.6% | 2004 | 17.6% | 2020 | 12.4% |
| 1989 | 14% | 2005 | 17.9% | 2021 | 13.7% |
| 1990 | 16.8% | 2006 | 18.9% | 2022 | 14.9% |
| 1991 | 15.6% | 2007 | 17.8% | 2023 | 15% |
| 1992 | 15.3% | 2008 | 19.4% | 2024 | 14.6% |
| 1993 | 13.5% | 2009 | 15.4% | 2025 | 13.3% |
| 1994 | 13.5% | 2010 | 15.6% | 2026 | 13.8% |
| 1995 | 12.5% | 2011 | 17% | | |
| 1996 | 12.5% | 2012 | 17.2% | | |
Show data table
| 1981 | 12.83T | 1997 | 107.81T | 2013 | 1.61Q |
| 1982 | 12.35T | 1998 | 152.26T | 2014 | 1.75Q |
| 1983 | 15.89T | 1999 | 188.43T | 2015 | 1.71Q |
| 1984 | 19.31T | 2000 | 203.05T | 2016 | 1.78Q |
| 1985 | 19.84T | 2001 | 317.75T | 2017 | 1.93Q |
| 1986 | 17.95T | 2002 | 324.03T | 2018 | 2.21Q |
| 1987 | 21.04T | 2003 | 374.49T | 2019 | 2.26Q |
| 1988 | 24.06T | 2004 | 438.8T | 2020 | 1.91Q |
| 1989 | 27.61T | 2005 | 538.89T | 2021 | 2.33Q |
| 1990 | 38.96T | 2006 | 685.24T | 2022 | 2.93Q |
| 1991 | 42.71T | 2007 | 764.12T | 2023 | 3.13Q |
| 1992 | 47.41T | 2008 | 1.05Q | 2024 | 3.23Q |
| 1993 | 53.81T | 2009 | 924.69T | 2025 | 3.16Q |
| 1994 | 62.48T | 2010 | 1.07Q | 2026 | 3.56Q |
| 1995 | 68.91T | 2011 | 1.33Q | | |
| 1996 | 80.24T | 2012 | 1.49Q | | |
Show data table
| 1993 | 14.1% | 2005 | 17.4% | 2017 | 16.4% |
| 1994 | 13.5% | 2006 | 18.4% | 2018 | 16.6% |
| 1995 | 11.9% | 2007 | 18.7% | 2019 | 16.4% |
| 1996 | 11.5% | 2008 | 19.4% | 2020 | 18.4% |
| 1997 | 15.2% | 2009 | 17% | 2021 | 18.1% |
| 1998 | 15.1% | 2010 | 16.9% | 2022 | 17.3% |
| 1999 | 15.1% | 2011 | 17.7% | 2023 | 16.6% |
| 2000 | 15.3% | 2012 | 18.8% | 2024 | 16.9% |
| 2001 | 19.5% | 2013 | 18.8% | 2025 | 16.2% |
| 2002 | 16.9% | 2014 | 18.4% | 2026 | 16.8% |
| 2003 | 18.2% | 2015 | 17.6% | | |
| 2004 | 17.8% | 2016 | 16.9% | | |
Show data table
| 1993 | 56.16T | 2005 | 524.96T | 2017 | 2.23Q |
| 1994 | 62.46T | 2006 | 668.86T | 2018 | 2.46Q |
| 1995 | 65.39T | 2007 | 805.06T | 2019 | 2.59Q |
| 1996 | 74.05T | 2008 | 1.05Q | 2020 | 2.85Q |
| 1997 | 115.66T | 2009 | 1.02Q | 2021 | 3.08Q |
| 1998 | 174.13T | 2010 | 1.16Q | 2022 | 3.38Q |
| 1999 | 201.18T | 2011 | 1.39Q | 2023 | 3.48Q |
| 2000 | 231.31T | 2012 | 1.62Q | 2024 | 3.73Q |
| 2001 | 349.32T | 2013 | 1.8Q | 2025 | 3.86Q |
| 2002 | 335.44T | 2014 | 1.94Q | 2026 | 4.32Q |
| 2003 | 398.08T | 2015 | 2.03Q | | |
| 2004 | 445.3T | 2016 | 2.1Q | | |