Show data table
| 1982 | 24.5% | 1997 | 10.8% | 2012 | 27.4% |
| 1983 | 24.6% | 1998 | 11.5% | 2013 | 27.3% |
| 1984 | 23.5% | 1999 | 12.6% | 2014 | 27.7% |
| 1985 | 23.4% | 2000 | 13.3% | 2015 | 28.5% |
| 1986 | 22% | 2001 | 14.6% | 2016 | 28.4% |
| 1987 | 19.7% | 2002 | 15.4% | 2017 | 28.7% |
| 1988 | 17.2% | 2003 | 15.6% | 2018 | 28.4% |
| 1989 | 17.6% | 2004 | 16.1% | 2019 | 27.6% |
| 1990 | 17.5% | 2005 | 16.6% | 2020 | 25.3% |
| 1991 | 15.5% | 2006 | 16.9% | 2021 | 26% |
| 1992 | 13.4% | 2007 | 17.9% | 2022 | 25.3% |
| 1993 | 12.5% | 2008 | 22.1% | 2023 | 26% |
| 1994 | 10.7% | 2009 | 23.5% | 2024 | 25.8% |
| 1995 | 10.1% | 2010 | 24.3% | 2025 | 25% |
| 1996 | 10.3% | 2011 | 26.6% | 2026 | 24.7% |
Show data table
| 1982 | 132B | 1997 | 865B | 2012 | 15.02T |
| 1983 | 149B | 1998 | 988B | 2013 | 16.54T |
| 1984 | 171B | 1999 | 1.14T | 2014 | 18.24T |
| 1985 | 213B | 2000 | 1.34T | 2015 | 20.08T |
| 1986 | 229B | 2001 | 1.64T | 2016 | 21.58T |
| 1987 | 241B | 2002 | 1.89T | 2017 | 24.23T |
| 1988 | 262B | 2003 | 2.17T | 2018 | 26.55T |
| 1989 | 305B | 2004 | 2.64T | 2019 | 27.79T |
| 1990 | 332B | 2005 | 3.16T | 2020 | 26.34T |
| 1991 | 343B | 2006 | 3.78T | 2021 | 30.51T |
| 1992 | 367B | 2007 | 4.93T | 2022 | 31.23T |
| 1993 | 449B | 2008 | 7.16T | 2023 | 33.68T |
| 1994 | 522B | 2009 | 8.31T | 2024 | 34.85T |
| 1995 | 624B | 2010 | 10.1T | 2025 | 35.06T |
| 1996 | 741B | 2011 | 13.08T | 2026 | 35.98T |
Show data table
| 1982 | 24.2% | 1997 | 11.5% | 2012 | 27.7% |
| 1983 | 24.6% | 1998 | 12.6% | 2013 | 28.1% |
| 1984 | 23.4% | 1999 | 14.8% | 2014 | 28.4% |
| 1985 | 22.5% | 2000 | 16.1% | 2015 | 31% |
| 1986 | 22.3% | 2001 | 17.2% | 2016 | 31.7% |
| 1987 | 20.4% | 2002 | 18.2% | 2017 | 32% |
| 1988 | 18.2% | 2003 | 18% | 2018 | 32.6% |
| 1989 | 18.6% | 2004 | 17.6% | 2019 | 33.6% |
| 1990 | 18.2% | 2005 | 18% | 2020 | 34.8% |
| 1991 | 16.5% | 2006 | 18.1% | 2021 | 31.9% |
| 1992 | 14.6% | 2007 | 17.9% | 2022 | 32.6% |
| 1993 | 13.4% | 2008 | 22.2% | 2023 | 32.7% |
| 1994 | 12.4% | 2009 | 25.2% | 2024 | 32.9% |
| 1995 | 11.1% | 2010 | 24.7% | 2025 | 32.9% |
| 1996 | 11% | 2011 | 26.6% | 2026 | 32.8% |
Show data table
| 1982 | 131B | 1997 | 923B | 2012 | 15.18T |
| 1983 | 149B | 1998 | 1.08T | 2013 | 17.03T |
| 1984 | 171B | 1999 | 1.35T | 2014 | 18.68T |
| 1985 | 205B | 2000 | 1.62T | 2015 | 21.84T |
| 1986 | 232B | 2001 | 1.93T | 2016 | 24.11T |
| 1987 | 249B | 2002 | 2.24T | 2017 | 27.05T |
| 1988 | 277B | 2003 | 2.5T | 2018 | 30.47T |
| 1989 | 321B | 2004 | 2.88T | 2019 | 33.84T |
| 1990 | 345B | 2005 | 3.43T | 2020 | 36.31T |
| 1991 | 366B | 2006 | 4.03T | 2021 | 37.43T |
| 1992 | 400B | 2007 | 4.91T | 2022 | 40.26T |
| 1993 | 481B | 2008 | 7.16T | 2023 | 42.37T |
| 1994 | 604B | 2009 | 8.92T | 2024 | 44.44T |
| 1995 | 682B | 2010 | 10.25T | 2025 | 46.09T |
| 1996 | 794B | 2011 | 13.13T | 2026 | 47.88T |