Show data table
| 1980 | 11.7% | 1996 | 10.4% | 2012 | 9.3% |
| 1981 | 8.2% | 1997 | 12.5% | 2013 | 9.3% |
| 1982 | 7.3% | 1998 | 11.6% | 2014 | 10.6% |
| 1983 | 7.4% | 1999 | 13.1% | 2015 | 10.2% |
| 1984 | 7.8% | 2000 | 13% | 2016 | 12.4% |
| 1985 | 9.5% | 2001 | 11.7% | 2017 | 12.8% |
| 1986 | 8.8% | 2002 | 8.3% | 2018 | 13% |
| 1987 | 8.3% | 2003 | 13.2% | 2019 | 13.9% |
| 1988 | 10.9% | 2004 | 17.5% | 2020 | 12.4% |
| 1989 | 12.1% | 2005 | 15.9% | 2021 | 11.1% |
| 1990 | 12.9% | 2006 | 12.8% | 2022 | 10.8% |
| 1991 | 9.1% | 2007 | 13.8% | 2023 | 13.6% |
| 1992 | 11.2% | 2008 | 14% | 2024 | 13.6% |
| 1993 | 10.7% | 2009 | 10.2% | 2025 | 11.3% |
| 1994 | 9.5% | 2010 | 11.5% | 2026 | 12.4% |
| 1995 | 9.4% | 2011 | 10% | | |
Show data table
| 1980 | 25.8B | 1996 | 418B | 2012 | 2.36T |
| 1981 | 21.2B | 1997 | 541B | 2013 | 2.55T |
| 1982 | 24.5B | 1998 | 557B | 2014 | 3.2T |
| 1983 | 29.8B | 1999 | 702B | 2015 | 3.38T |
| 1984 | 35.4B | 2000 | 814B | 2016 | 4.68T |
| 1985 | 47.7B | 2001 | 838B | 2017 | 5.27T |
| 1986 | 51.9B | 2002 | 611B | 2018 | 5.97T |
| 1987 | 56.8B | 2003 | 1.04T | 2019 | 7.11T |
| 1988 | 97.5B | 2004 | 1.65T | 2020 | 6.13T |
| 1989 | 124B | 2005 | 1.86T | 2021 | 6.09T |
| 1990 | 151B | 2006 | 1.75T | 2022 | 6.77T |
| 1991 | 109B | 2007 | 2.2T | 2023 | 9.65T |
| 1992 | 155B | 2008 | 2.56T | 2024 | 10.84T |
| 1993 | 167B | 2009 | 1.93T | 2025 | 10.03T |
| 1994 | 204B | 2010 | 2.4T | 2026 | 12.32T |
| 1995 | 308B | 2011 | 2.34T | | |
Show data table
| 1980 | 22.7% | 1996 | 14.4% | 2012 | 11.5% |
| 1981 | 18.2% | 1997 | 14.5% | 2013 | 12.7% |
| 1982 | 14.3% | 1998 | 16.9% | 2014 | 12.6% |
| 1983 | 13.4% | 1999 | 15.5% | 2015 | 13% |
| 1984 | 13.9% | 2000 | 15.3% | 2016 | 13.5% |
| 1985 | 11.8% | 2001 | 15.3% | 2017 | 14.9% |
| 1986 | 11.1% | 2002 | 12.4% | 2018 | 14.4% |
| 1987 | 10.4% | 2003 | 16.6% | 2019 | 15.4% |
| 1988 | 11.4% | 2004 | 21.7% | 2020 | 16.4% |
| 1989 | 15.5% | 2005 | 18.4% | 2021 | 13.9% |
| 1990 | 13.3% | 2006 | 18.5% | 2022 | 16.2% |
| 1991 | 13.5% | 2007 | 16.1% | 2023 | 17.7% |
| 1992 | 16.2% | 2008 | 15.7% | 2024 | 16.1% |
| 1993 | 17.1% | 2009 | 12.5% | 2025 | 13.5% |
| 1994 | 16.7% | 2010 | 12.3% | 2026 | 17.1% |
| 1995 | 14.5% | 2011 | 12% | | |
Show data table
| 1980 | 50B | 1996 | 577B | 2012 | 2.93T |
| 1981 | 47B | 1997 | 627B | 2013 | 3.48T |
| 1982 | 47.8B | 1998 | 811B | 2014 | 3.8T |
| 1983 | 54.2B | 1999 | 832B | 2015 | 4.33T |
| 1984 | 62.8B | 2000 | 962B | 2016 | 5.1T |
| 1985 | 59.7B | 2001 | 1.1T | 2017 | 6.14T |
| 1986 | 65.1B | 2002 | 910B | 2018 | 6.59T |
| 1987 | 71.4B | 2003 | 1.31T | 2019 | 7.84T |
| 1988 | 103B | 2004 | 2.05T | 2020 | 8.09T |
| 1989 | 158B | 2005 | 2.15T | 2021 | 7.64T |
| 1990 | 157B | 2006 | 2.53T | 2022 | 10.2T |
| 1991 | 161B | 2007 | 2.57T | 2023 | 12.6T |
| 1992 | 224B | 2008 | 2.88T | 2024 | 12.82T |
| 1993 | 266B | 2009 | 2.35T | 2025 | 11.98T |
| 1994 | 361B | 2010 | 2.56T | 2026 | 16.87T |
| 1995 | 475B | 2011 | 2.82T | | |