表を表示
| 1990 | 22.5% | 2003 | 22.2% | 2016 | 21% |
| 1991 | 19.4% | 2004 | 20.8% | 2017 | 20.8% |
| 1992 | 18% | 2005 | 18.2% | 2018 | 22.2% |
| 1993 | 21.3% | 2006 | 21% | 2019 | 20.5% |
| 1994 | 19.4% | 2007 | 18.3% | 2020 | 21.3% |
| 1995 | 19.2% | 2008 | 16.5% | 2021 | 23.4% |
| 1996 | 24.1% | 2009 | 16% | 2022 | 25.6% |
| 1997 | 20.9% | 2010 | 16.9% | 2023 | 22.3% |
| 1998 | 12.4% | 2011 | 17.1% | 2024 | 22.2% |
| 1999 | 13.1% | 2012 | 23.2% | 2025 | 23.1% |
| 2000 | 15% | 2013 | 19.4% | 2026 | 24.5% |
| 2001 | 15.8% | 2014 | 21.3% | | |
| 2002 | 22.5% | 2015 | 23.2% | | |
表を表示
| 1990 | 22億 | 2003 | 120億 | 2016 | 473億 |
| 1991 | 22.1億 | 2004 | 130億 | 2017 | 507億 |
| 1992 | 22.9億 | 2005 | 142億 | 2018 | 592億 |
| 1993 | 32.2億 | 2006 | 222億 | 2019 | 593億 |
| 1994 | 31.6億 | 2007 | 205億 | 2020 | 655億 |
| 1995 | 35.3億 | 2008 | 205億 | 2021 | 778億 |
| 1996 | 47.7億 | 2009 | 198億 | 2022 | 904億 |
| 1997 | 44.6億 | 2010 | 262億 | 2023 | 874億 |
| 1998 | 47.4億 | 2011 | 325億 | 2024 | 960億 |
| 1999 | 54.6億 | 2012 | 463億 | 2025 | 1,109億 |
| 2000 | 63.8億 | 2013 | 422億 | 2026 | 1,380億 |
| 2001 | 70.7億 | 2014 | 424億 | | |
| 2002 | 109億 | 2015 | 465億 | | |
表を表示
| 2004 | 23.9% | 2012 | 21.5% | 2020 | 18.5% |
| 2005 | 21.3% | 2013 | 20.1% | 2021 | 20.8% |
| 2006 | 19% | 2014 | 23.9% | 2022 | 28.7% |
| 2007 | 19.7% | 2015 | 25.7% | 2023 | 24.8% |
| 2008 | 19.8% | 2016 | 20.8% | 2024 | 23.6% |
| 2009 | 19.6% | 2017 | 20.3% | 2025 | 23.4% |
| 2010 | 17.3% | 2018 | 19% | 2026 | 24% |
| 2011 | 17% | 2019 | 17.8% | | |
表を表示
| 2004 | 150億 | 2012 | 430億 | 2020 | 569億 |
| 2005 | 166億 | 2013 | 437億 | 2021 | 691億 |
| 2006 | 200億 | 2014 | 477億 | 2022 | 1,013億 |
| 2007 | 221億 | 2015 | 514億 | 2023 | 970億 |
| 2008 | 246億 | 2016 | 470億 | 2024 | 1,018億 |
| 2009 | 243億 | 2017 | 494億 | 2025 | 1,124億 |
| 2010 | 269億 | 2018 | 506億 | 2026 | 1,351億 |
| 2011 | 324億 | 2019 | 516億 | | |