Show data table
| 1980 | 15% | 1996 | 19.3% | 2012 | 17% |
| 1981 | 13.4% | 1997 | 21.1% | 2013 | 15.9% |
| 1982 | 14.7% | 1998 | 22.2% | 2014 | 16.9% |
| 1983 | 13.3% | 1999 | 21.9% | 2015 | 17.5% |
| 1984 | 12.6% | 2000 | 19.1% | 2016 | 17.3% |
| 1985 | 12.2% | 2001 | 19.1% | 2017 | 17.6% |
| 1986 | 12.3% | 2002 | 15.7% | 2018 | 17.5% |
| 1987 | 12.8% | 2003 | 14.5% | 2019 | 17.7% |
| 1988 | 12.8% | 2004 | 15.3% | 2020 | 16.9% |
| 1989 | 17.3% | 2005 | 14.8% | 2021 | 17.1% |
| 1990 | 18.1% | 2006 | 15% | 2022 | 17.6% |
| 1991 | 14.8% | 2007 | 14.4% | 2023 | 17.7% |
| 1992 | 16.1% | 2008 | 14.1% | 2024 | 18.8% |
| 1993 | 17.2% | 2009 | 14.8% | 2025 | 17.9% |
| 1994 | 19.1% | 2010 | 14.9% | 2026 | 17.9% |
| 1995 | 18.5% | 2011 | 16% | | |
Show data table
| 1980 | 77.5B | 1996 | 3.9T | 2012 | 25.03T |
| 1981 | 88.4B | 1997 | 4.57T | 2013 | 26.48T |
| 1982 | 101B | 1998 | 5.61T | 2014 | 30.38T |
| 1983 | 102B | 1999 | 6.03T | 2015 | 33.06T |
| 1984 | 125B | 2000 | 5.89T | 2016 | 35.46T |
| 1985 | 158B | 2001 | 6.67T | 2017 | 38.61T |
| 1986 | 210B | 2002 | 6.48T | 2018 | 40.29T |
| 1987 | 297B | 2003 | 7.18T | 2019 | 41.84T |
| 1988 | 392B | 2004 | 8.83T | 2020 | 40.58T |
| 1989 | 740B | 2005 | 9.81T | 2021 | 46.16T |
| 1990 | 1.09T | 2006 | 11.35T | 2022 | 51.33T |
| 1991 | 1.37T | 2007 | 12.9T | 2023 | 55.52T |
| 1992 | 1.73T | 2008 | 15.16T | 2024 | 63.45T |
| 1993 | 2.17T | 2009 | 16.49T | 2025 | 66.74T |
| 1994 | 2.86T | 2010 | 19.2T | 2026 | 71.85T |
| 1995 | 3.29T | 2011 | 22.63T | | |
Show data table
| 1980 | 11.6% | 1996 | 16.9% | 2012 | 17.6% |
| 1981 | 13.3% | 1997 | 18.1% | 2013 | 17.1% |
| 1982 | 13.2% | 1998 | 18% | 2014 | 17.1% |
| 1983 | 13% | 1999 | 19.2% | 2015 | 18% |
| 1984 | 13% | 2000 | 19.6% | 2016 | 17.7% |
| 1985 | 11.4% | 2001 | 19% | 2017 | 18.1% |
| 1986 | 9.3% | 2002 | 17.6% | 2018 | 18.5% |
| 1987 | 10.2% | 2003 | 14.6% | 2019 | 20.1% |
| 1988 | 9.8% | 2004 | 14% | 2020 | 22.6% |
| 1989 | 11.8% | 2005 | 14% | 2021 | 20.5% |
| 1990 | 10.5% | 2006 | 14.1% | 2022 | 20.2% |
| 1991 | 11.4% | 2007 | 13.1% | 2023 | 21.5% |
| 1992 | 13% | 2008 | 11.8% | 2024 | 20.9% |
| 1993 | 12.9% | 2009 | 14.3% | 2025 | 19.6% |
| 1994 | 14.5% | 2010 | 13.3% | 2026 | 19.3% |
| 1995 | 15.7% | 2011 | 14.7% | | |
Show data table
| 1980 | 60B | 1996 | 3.41T | 2012 | 25.89T |
| 1981 | 87.4B | 1997 | 3.92T | 2013 | 28.41T |
| 1982 | 90.7B | 1998 | 4.53T | 2014 | 30.87T |
| 1983 | 99.8B | 1999 | 5.29T | 2015 | 33.88T |
| 1984 | 129B | 2000 | 6.06T | 2016 | 36.22T |
| 1985 | 147B | 2001 | 6.64T | 2017 | 39.57T |
| 1986 | 158B | 2002 | 7.26T | 2018 | 42.63T |
| 1987 | 235B | 2003 | 7.21T | 2019 | 47.62T |
| 1988 | 299B | 2004 | 8.06T | 2020 | 54.3T |
| 1989 | 506B | 2005 | 9.32T | 2021 | 55.34T |
| 1990 | 636B | 2006 | 10.66T | 2022 | 59.06T |
| 1991 | 1.05T | 2007 | 11.76T | 2023 | 67.49T |
| 1992 | 1.39T | 2008 | 12.7T | 2024 | 70.56T |
| 1993 | 1.64T | 2009 | 15.83T | 2025 | 73.03T |
| 1994 | 2.17T | 2010 | 17.21T | 2026 | 77.16T |
| 1995 | 2.8T | 2011 | 20.81T | | |