데이터 표
| 1980 | 43.6% | 1996 | 71.2% | 2012 | 65.7% |
| 1981 | 46.9% | 1997 | 65.7% | 2013 | 67.2% |
| 1982 | 52.4% | 1998 | 62.7% | 2014 | 67.2% |
| 1983 | 58.4% | 1999 | 58.6% | 2015 | 63.8% |
| 1984 | 61.9% | 2000 | 52.2% | 2016 | 60.9% |
| 1985 | 67.1% | 2001 | 49.4% | 2017 | 56% |
| 1986 | 68.9% | 2002 | 48.7% | 2018 | 51.6% |
| 1987 | 71.3% | 2003 | 49.8% | 2019 | 47.7% |
| 1988 | 73.7% | 2004 | 50.1% | 2020 | 53.4% |
| 1989 | 73.7% | 2005 | 49.6% | 2021 | 50.5% |
| 1990 | 75% | 2006 | 45% | 2022 | 48.4% |
| 1991 | 74.8% | 2007 | 42.7% | 2023 | 45.9% |
| 1992 | 75.6% | 2008 | 54.4% | 2024 | 43.7% |
| 1993 | 76.7% | 2009 | 56.3% | 2025 | 43.3% |
| 1994 | 73.5% | 2010 | 58.9% | 2026 | 44.1% |
| 1995 | 73% | 2011 | 61.2% | | |
데이터 표
| 1980 | 761억 | 1996 | 2,460억 | 2012 | 4,324억 |
| 1981 | 859억 | 1997 | 2,429억 | 2013 | 4,470억 |
| 1982 | 1,000억 | 1998 | 2,475억 | 2014 | 4,558억 |
| 1983 | 1,157억 | 1999 | 2,462억 | 2015 | 4,461억 |
| 1984 | 1,283억 | 2000 | 2,358억 | 2016 | 4,385억 |
| 1985 | 1,453억 | 2001 | 2,386억 | 2017 | 4,204억 |
| 1986 | 1,541억 | 2002 | 2,449억 | 2018 | 4,059억 |
| 1987 | 1,618억 | 2003 | 2,564억 | 2019 | 3,954억 |
| 1988 | 1,745억 | 2004 | 2,663억 | 2020 | 4,361억 |
| 1989 | 1,849억 | 2005 | 2,742억 | 2021 | 4,502억 |
| 1990 | 1,990억 | 2006 | 2,641억 | 2022 | 4,811억 |
| 1991 | 2,097억 | 2007 | 2,662억 | 2023 | 4,815억 |
| 1992 | 2,206억 | 2008 | 3,540억 | 2024 | 4,911억 |
| 1993 | 2,302억 | 2009 | 3,547억 | 2025 | 5,114억 |
| 1994 | 2,320억 | 2010 | 3,787억 | 2026 | 5,426억 |
| 1995 | 2,410억 | 2011 | 4,013억 | | |
데이터 표
| 1995 | 55.8% | 2006 | 37.2% | 2017 | 46.1% |
| 1996 | 54.9% | 2007 | 34.4% | 2018 | 42.5% |
| 1997 | 51.7% | 2008 | 39.8% | 2019 | 39.3% |
| 1998 | 49% | 2009 | 42.3% | 2020 | 44% |
| 1999 | 45.8% | 2010 | 46.1% | 2021 | 41.6% |
| 2000 | 40.3% | 2011 | 48.7% | 2022 | 39.9% |
| 2001 | 38.9% | 2012 | 52.3% | 2023 | 37.8% |
| 2002 | 39.1% | 2013 | 54% | 2024 | 36% |
| 2003 | 40.8% | 2014 | 54.9% | 2025 | 35.7% |
| 2004 | 41.5% | 2015 | 53% | 2026 | 36.4% |
| 2005 | 39.9% | 2016 | 51% | | |
데이터 표
| 1995 | 1,842억 | 2006 | 2,187억 | 2017 | 3,464억 |
| 1996 | 1,895억 | 2007 | 2,144억 | 2018 | 3,344억 |
| 1997 | 1,910억 | 2008 | 2,590억 | 2019 | 3,258억 |
| 1998 | 1,933억 | 2009 | 2,666억 | 2020 | 3,593억 |
| 1999 | 1,924억 | 2010 | 2,967억 | 2021 | 3,710억 |
| 2000 | 1,821억 | 2011 | 3,194억 | 2022 | 3,965억 |
| 2001 | 1,878억 | 2012 | 3,443억 | 2023 | 3,967억 |
| 2002 | 1,965억 | 2013 | 3,591억 | 2024 | 4,046억 |
| 2003 | 2,099억 | 2014 | 3,729억 | 2025 | 4,214억 |
| 2004 | 2,206억 | 2015 | 3,703억 | 2026 | 4,471억 |
| 2005 | 2,205억 | 2016 | 3,675억 | | |