Show data table
| 1982 | 13.1% | 1997 | 14.6% | 2012 | 16.8% |
| 1983 | 12.5% | 1998 | 15.3% | 2013 | 18% |
| 1984 | 12.3% | 1999 | 14.5% | 2014 | 17.7% |
| 1985 | 12.5% | 2000 | 14.5% | 2015 | 17.1% |
| 1986 | 12.3% | 2001 | 14.4% | 2016 | 17.9% |
| 1987 | 13.2% | 2002 | 14.4% | 2017 | 17.8% |
| 1988 | 14% | 2003 | 15.3% | 2018 | 17.5% |
| 1989 | 13.9% | 2004 | 15.9% | 2019 | 17% |
| 1990 | 13.9% | 2005 | 16.1% | 2020 | 16.7% |
| 1991 | 9.9% | 2006 | 16.9% | 2021 | 16.8% |
| 1992 | 9.3% | 2007 | 17.1% | 2022 | 17.1% |
| 1993 | 10.3% | 2008 | 17% | 2023 | 17% |
| 1994 | 14.7% | 2009 | 17.1% | 2024 | 17.5% |
| 1995 | 17.1% | 2010 | 17.9% | 2025 | 17.6% |
| 1996 | 14.7% | 2011 | 16.5% | 2026 | 17.2% |
Show data table
| 1982 | 17.5B | 1997 | 169B | 2012 | 801B |
| 1983 | 18.7B | 1998 | 191B | 2013 | 955B |
| 1984 | 20.8B | 1999 | 190B | 2014 | 1.06T |
| 1985 | 24B | 2000 | 201B | 2015 | 1.18T |
| 1986 | 27.6B | 2001 | 212B | 2016 | 1.36T |
| 1987 | 33B | 2002 | 215B | 2017 | 1.51T |
| 1988 | 39B | 2003 | 248B | 2018 | 1.64T |
| 1989 | 44.7B | 2004 | 288B | 2019 | 1.74T |
| 1990 | 51.6B | 2005 | 319B | 2020 | 1.79T |
| 1991 | 41.6B | 2006 | 361B | 2021 | 2.02T |
| 1992 | 45.3B | 2007 | 423B | 2022 | 2.31T |
| 1993 | 62.9B | 2008 | 482B | 2023 | 2.55T |
| 1994 | 103B | 2009 | 562B | 2024 | 2.84T |
| 1995 | 140B | 2010 | 643B | 2025 | 3.1T |
| 1996 | 152B | 2011 | 686B | 2026 | 3.36T |
Show data table
| 1982 | 16.2% | 1997 | 15.6% | 2012 | 22.1% |
| 1983 | 14.6% | 1998 | 15.3% | 2013 | 23.2% |
| 1984 | 14.9% | 1999 | 13.7% | 2014 | 23.4% |
| 1985 | 15.6% | 2000 | 14.1% | 2015 | 23.8% |
| 1986 | 15.3% | 2001 | 14.9% | 2016 | 25.3% |
| 1987 | 15.5% | 2002 | 15.7% | 2017 | 25.2% |
| 1988 | 15.9% | 2003 | 16% | 2018 | 24.5% |
| 1989 | 16.3% | 2004 | 15.4% | 2019 | 24.4% |
| 1990 | 17.2% | 2005 | 16.2% | 2020 | 24.8% |
| 1991 | 16.4% | 2006 | 17.3% | 2021 | 24% |
| 1992 | 17.6% | 2007 | 18.1% | 2022 | 23.1% |
| 1993 | 18.9% | 2008 | 18.9% | 2023 | 22.6% |
| 1994 | 18.8% | 2009 | 20.3% | 2024 | 23.2% |
| 1995 | 17.3% | 2010 | 21.5% | 2025 | 24% |
| 1996 | 15.2% | 2011 | 20.1% | 2026 | 23.7% |
Show data table
| 1982 | 21.6B | 1997 | 179B | 2012 | 1.05T |
| 1983 | 22B | 1998 | 191B | 2013 | 1.23T |
| 1984 | 25.1B | 1999 | 179B | 2014 | 1.41T |
| 1985 | 29.8B | 2000 | 195B | 2015 | 1.64T |
| 1986 | 34.3B | 2001 | 219B | 2016 | 1.92T |
| 1987 | 38.6B | 2002 | 235B | 2017 | 2.14T |
| 1988 | 44.5B | 2003 | 260B | 2018 | 2.28T |
| 1989 | 52.4B | 2004 | 279B | 2019 | 2.5T |
| 1990 | 63.7B | 2005 | 323B | 2020 | 2.66T |
| 1991 | 69.2B | 2006 | 370B | 2021 | 2.89T |
| 1992 | 85.4B | 2007 | 447B | 2022 | 3.12T |
| 1993 | 115B | 2008 | 537B | 2023 | 3.4T |
| 1994 | 132B | 2009 | 664B | 2024 | 3.77T |
| 1995 | 142B | 2010 | 775B | 2025 | 4.23T |
| 1996 | 157B | 2011 | 837B | 2026 | 4.61T |