데이터 표
| 1981 | 19.9% | 1997 | 20.5% | 2013 | 21% |
| 1982 | 16.3% | 1998 | 16.7% | 2014 | 20.8% |
| 1983 | 14.4% | 1999 | 17.8% | 2015 | 18.6% |
| 1984 | 14.2% | 2000 | 16.9% | 2016 | 22.6% |
| 1985 | 15.5% | 2001 | 13.4% | 2017 | 22.9% |
| 1986 | 14.5% | 2002 | 13.7% | 2018 | 20.7% |
| 1987 | 14.8% | 2003 | 16.4% | 2019 | 20.4% |
| 1988 | 15% | 2004 | 17.9% | 2020 | 20.7% |
| 1989 | 15% | 2005 | 17.2% | 2021 | 23.7% |
| 1990 | 14.5% | 2006 | 18.8% | 2022 | 21.7% |
| 1991 | 15.9% | 2007 | 21.3% | 2023 | 18.1% |
| 1992 | 16.2% | 2008 | 18.9% | 2024 | 17.4% |
| 1993 | 17.3% | 2009 | 18.8% | 2025 | 18.5% |
| 1994 | 16.4% | 2010 | 20.7% | 2026 | 17.7% |
| 1995 | 15.8% | 2011 | 22.4% | | |
| 1996 | 16.4% | 2012 | 21.4% | | |
데이터 표
| 1981 | 358억 | 1997 | 2,812억 | 2013 | 4,553억 |
| 1982 | 323억 | 1998 | 2,161억 | 2014 | 4,787억 |
| 1983 | 328억 | 1999 | 2,330억 | 2015 | 4,500억 |
| 1984 | 385억 | 2000 | 2,251억 | 2016 | 5,731억 |
| 1985 | 437억 | 2001 | 1,756억 | 2017 | 6,198억 |
| 1986 | 486억 | 2002 | 1,775억 | 2018 | 5,998억 |
| 1987 | 609억 | 2003 | 2,073억 | 2019 | 5,909억 |
| 1988 | 727억 | 2004 | 2,382억 | 2020 | 5,642억 |
| 1989 | 824억 | 2005 | 2,470억 | 2021 | 6,936억 |
| 1990 | 895억 | 2006 | 2,880억 | 2022 | 6,221억 |
| 1991 | 1,147억 | 2007 | 3,585억 | 2023 | 5,494억 |
| 1992 | 1,353억 | 2008 | 3,166억 | 2024 | 5,649억 |
| 1993 | 1,666억 | 2009 | 3,184억 | 2025 | 6,273억 |
| 1994 | 1,750억 | 2010 | 3,765억 | 2026 | 6,339억 |
| 1995 | 1,800억 | 2011 | 4,377억 | | |
| 1996 | 2,084억 | 2012 | 4,422억 | | |
데이터 표
| 1981 | 17.1% | 1997 | 14.1% | 2013 | 20% |
| 1982 | 16.7% | 1998 | 18.5% | 2014 | 17.3% |
| 1983 | 15.5% | 1999 | 17.1% | 2015 | 18% |
| 1984 | 13.3% | 2000 | 17.5% | 2016 | 18.3% |
| 1985 | 14.5% | 2001 | 18.2% | 2017 | 17.4% |
| 1986 | 12.7% | 2002 | 18.5% | 2018 | 18.4% |
| 1987 | 11.8% | 2003 | 19.6% | 2019 | 21% |
| 1988 | 11.7% | 2004 | 18.2% | 2020 | 29.9% |
| 1989 | 13% | 2005 | 16.2% | 2021 | 23.7% |
| 1990 | 13.8% | 2006 | 14.8% | 2022 | 28.3% |
| 1991 | 12.8% | 2007 | 13.9% | 2023 | 23.7% |
| 1992 | 13.5% | 2008 | 18.6% | 2024 | 23.2% |
| 1993 | 15.3% | 2009 | 17.3% | 2025 | 23.2% |
| 1994 | 15.4% | 2010 | 16.6% | 2026 | 22.9% |
| 1995 | 16.1% | 2011 | 18.6% | | |
| 1996 | 14.4% | 2012 | 18.3% | | |
데이터 표
| 1981 | 308억 | 1997 | 1,944억 | 2013 | 4,335억 |
| 1982 | 331억 | 1998 | 2,394억 | 2014 | 3,962억 |
| 1983 | 353억 | 1999 | 2,230억 | 2015 | 4,356억 |
| 1984 | 361억 | 2000 | 2,329억 | 2016 | 4,621억 |
| 1985 | 408억 | 2001 | 2,389억 | 2017 | 4,709억 |
| 1986 | 427억 | 2002 | 2,392억 | 2018 | 5,318억 |
| 1987 | 484억 | 2003 | 2,475억 | 2019 | 6,078억 |
| 1988 | 566억 | 2004 | 2,422억 | 2020 | 8,161억 |
| 1989 | 714억 | 2005 | 2,331억 | 2021 | 6,933억 |
| 1990 | 856억 | 2006 | 2,269억 | 2022 | 8,105억 |
| 1991 | 922억 | 2007 | 2,348억 | 2023 | 7,213억 |
| 1992 | 1,133억 | 2008 | 3,124억 | 2024 | 7,532억 |
| 1993 | 1,474억 | 2009 | 2,925억 | 2025 | 7,892억 |
| 1994 | 1,642억 | 2010 | 3,014억 | 2026 | 8,184억 |
| 1995 | 1,832억 | 2011 | 3,640억 | | |
| 1996 | 1,827억 | 2012 | 3,773억 | | |