데이터 표
| 1981 | 33.2% | 1997 | 22.4% | 2013 | 30.9% |
| 1982 | 8.1% | 1998 | 22.3% | 2014 | 32% |
| 1983 | 11% | 1999 | 22.8% | 2015 | 31.2% |
| 1984 | 3.2% | 2000 | 22.9% | 2016 | 26.9% |
| 1985 | 10.7% | 2001 | 22.5% | 2017 | 25.1% |
| 1986 | 17.5% | 2002 | 21.8% | 2018 | 24.6% |
| 1987 | 15% | 2003 | 21.5% | 2019 | 24.1% |
| 1988 | 15.6% | 2004 | 24.1% | 2020 | 21% |
| 1989 | 16.9% | 2005 | 27.6% | 2021 | 21.6% |
| 1990 | 16.4% | 2006 | 30.6% | 2022 | 25% |
| 1991 | 17.9% | 2007 | 27.6% | 2023 | 24% |
| 1992 | 18.7% | 2008 | 34.2% | 2024 | 24.8% |
| 1993 | 18.9% | 2009 | 31.2% | 2025 | 20.6% |
| 1994 | 21.3% | 2010 | 28.9% | 2026 | 19.7% |
| 1995 | 21.4% | 2011 | 31.3% | | |
| 1996 | 21.6% | 2012 | 32.8% | | |
데이터 표
| 1981 | 0만 | 1997 | 104억 | 2013 | 763억 |
| 1982 | 0만 | 1998 | 116억 | 2014 | 863억 |
| 1983 | 0만 | 1999 | 123억 | 2015 | 857억 |
| 1984 | 100만 | 2000 | 133억 | 2016 | 768억 |
| 1985 | 2.84억 | 2001 | 135억 | 2017 | 798억 |
| 1986 | 14.9억 | 2002 | 139억 | 2018 | 822억 |
| 1987 | 14.9억 | 2003 | 149억 | 2019 | 817억 |
| 1988 | 18.9억 | 2004 | 187억 | 2020 | 613억 |
| 1989 | 24억 | 2005 | 238억 | 2021 | 713억 |
| 1990 | 28.4억 | 2006 | 315억 | 2022 | 881억 |
| 1991 | 38.2억 | 2007 | 320억 | 2023 | 869억 |
| 1992 | 45.9억 | 2008 | 469억 | 2024 | 941억 |
| 1993 | 51.6억 | 2009 | 436억 | 2025 | 907억 |
| 1994 | 65.7억 | 2010 | 457억 | 2026 | 1,091억 |
| 1995 | 77.3억 | 2011 | 602억 | | |
| 1996 | 90.6억 | 2012 | 707억 | | |
데이터 표
| 1981 | 41.8% | 1997 | 25.3% | 2013 | 30.4% |
| 1982 | 22.4% | 1998 | 26.8% | 2014 | 34.9% |
| 1983 | 28.7% | 1999 | 26.3% | 2015 | 37% |
| 1984 | 26% | 2000 | 26.2% | 2016 | 32.9% |
| 1985 | 19.5% | 2001 | 28.6% | 2017 | 31.6% |
| 1986 | 19.9% | 2002 | 29.6% | 2018 | 31.4% |
| 1987 | 21.8% | 2003 | 28.6% | 2019 | 30.1% |
| 1988 | 21.5% | 2004 | 29% | 2020 | 31.9% |
| 1989 | 21.8% | 2005 | 29.5% | 2021 | 29.4% |
| 1990 | 20.4% | 2006 | 26.6% | 2022 | 31.2% |
| 1991 | 21.6% | 2007 | 28.9% | 2023 | 33.5% |
| 1992 | 22.6% | 2008 | 31.1% | 2024 | 33.5% |
| 1993 | 24.3% | 2009 | 28.9% | 2025 | 32.2% |
| 1994 | 24% | 2010 | 27.5% | 2026 | 29% |
| 1995 | 23.1% | 2011 | 30.6% | | |
| 1996 | 23.3% | 2012 | 31.3% | | |
데이터 표
| 1981 | 0만 | 1997 | 118억 | 2013 | 751억 |
| 1982 | 0만 | 1998 | 140억 | 2014 | 940억 |
| 1983 | 0만 | 1999 | 141억 | 2015 | 1,015억 |
| 1984 | 600만 | 2000 | 152억 | 2016 | 938억 |
| 1985 | 5.15억 | 2001 | 172억 | 2017 | 1,001억 |
| 1986 | 16.9억 | 2002 | 189억 | 2018 | 1,050억 |
| 1987 | 21.7억 | 2003 | 198억 | 2019 | 1,021억 |
| 1988 | 25.9억 | 2004 | 225억 | 2020 | 934억 |
| 1989 | 31억 | 2005 | 256억 | 2021 | 974억 |
| 1990 | 35.2억 | 2006 | 274억 | 2022 | 1,098억 |
| 1991 | 46.3억 | 2007 | 336억 | 2023 | 1,211억 |
| 1992 | 55.6억 | 2008 | 426억 | 2024 | 1,271억 |
| 1993 | 66.5억 | 2009 | 404억 | 2025 | 1,418억 |
| 1994 | 74억 | 2010 | 434억 | 2026 | 1,606억 |
| 1995 | 83.1억 | 2011 | 588억 | | |
| 1996 | 97.8억 | 2012 | 674억 | | |