데이터 표
| 1981 | 46.4% | 1997 | 35.9% | 2013 | 28% |
| 1982 | 35% | 1998 | 32.4% | 2014 | 31.3% |
| 1983 | 41.2% | 1999 | 38.9% | 2015 | 27.1% |
| 1984 | 41.4% | 2000 | 39.6% | 2016 | 28.1% |
| 1985 | 45.1% | 2001 | 38.1% | 2017 | 26.1% |
| 1986 | 45.3% | 2002 | 35% | 2018 | 30.2% |
| 1987 | 46.9% | 2003 | 24.5% | 2019 | 22.8% |
| 1988 | 46.7% | 2004 | 32.8% | 2020 | 29.1% |
| 1989 | 36.7% | 2005 | 29.5% | 2021 | 30.9% |
| 1990 | 28.6% | 2006 | 33.4% | 2022 | 25.1% |
| 1991 | 30.3% | 2007 | 34% | 2023 | 24.1% |
| 1992 | 31% | 2008 | 33.5% | 2024 | 26.5% |
| 1993 | 39.9% | 2009 | 38.5% | 2025 | 27.8% |
| 1994 | 37.7% | 2010 | 43.5% | 2026 | 32.1% |
| 1995 | 37.7% | 2011 | 33.1% | | |
| 1996 | 40.4% | 2012 | 33% | | |
데이터 표
| 1981 | 5.75억 | 1997 | 46.6억 | 2013 | 307억 |
| 1982 | 4.98억 | 1998 | 49.5억 | 2014 | 378억 |
| 1983 | 6.76억 | 1999 | 69.2억 | 2015 | 362억 |
| 1984 | 7.9억 | 2000 | 78.6억 | 2016 | 420억 |
| 1985 | 9.7억 | 2001 | 83.8억 | 2017 | 427억 |
| 1986 | 11.2억 | 2002 | 88.5억 | 2018 | 521억 |
| 1987 | 14.5억 | 2003 | 70.5억 | 2019 | 420억 |
| 1988 | 17.7억 | 2004 | 104억 | 2020 | 546억 |
| 1989 | 16.2억 | 2005 | 105억 | 2021 | 597억 |
| 1990 | 14.7억 | 2006 | 135억 | 2022 | 544억 |
| 1991 | 17.5억 | 2007 | 161억 | 2023 | 575억 |
| 1992 | 19.9억 | 2008 | 183억 | 2024 | 702억 |
| 1993 | 28.8억 | 2009 | 234억 | 2025 | 815억 |
| 1994 | 31.2억 | 2010 | 310억 | 2026 | 1,050억 |
| 1995 | 36.5억 | 2011 | 282억 | | |
| 1996 | 44.9억 | 2012 | 326억 | | |
데이터 표
| 1981 | 50% | 1997 | 37.8% | 2013 | 32.5% |
| 1982 | 33.9% | 1998 | 31.1% | 2014 | 28.9% |
| 1983 | 42.2% | 1999 | 40.2% | 2015 | 27.5% |
| 1984 | 39.3% | 2000 | 43% | 2016 | 30.5% |
| 1985 | 54.1% | 2001 | 50.3% | 2017 | 30.6% |
| 1986 | 48.7% | 2002 | 39.3% | 2018 | 31.7% |
| 1987 | 47.5% | 2003 | 34.7% | 2019 | 24.2% |
| 1988 | 45.3% | 2004 | 31% | 2020 | 30.9% |
| 1989 | 46.8% | 2005 | 36.4% | 2021 | 36.6% |
| 1990 | 35.8% | 2006 | 33.4% | 2022 | 32.1% |
| 1991 | 30.8% | 2007 | 33.2% | 2023 | 28.9% |
| 1992 | 34.5% | 2008 | 36.1% | 2024 | 28.3% |
| 1993 | 35.2% | 2009 | 39.3% | 2025 | 30.5% |
| 1994 | 37.9% | 2010 | 41.5% | 2026 | 35% |
| 1995 | 38.6% | 2011 | 36.1% | | |
| 1996 | 37.9% | 2012 | 35.1% | | |
데이터 표
| 1981 | 6.18억 | 1997 | 49.1억 | 2013 | 356억 |
| 1982 | 4.83억 | 1998 | 47.5억 | 2014 | 349억 |
| 1983 | 6.92억 | 1999 | 71.5억 | 2015 | 369억 |
| 1984 | 7.5억 | 2000 | 85.3억 | 2016 | 455억 |
| 1985 | 11.7억 | 2001 | 111억 | 2017 | 500억 |
| 1986 | 12.1억 | 2002 | 99.4억 | 2018 | 547억 |
| 1987 | 14.6억 | 2003 | 99.9억 | 2019 | 448억 |
| 1988 | 17.2억 | 2004 | 98.7억 | 2020 | 580억 |
| 1989 | 20.7억 | 2005 | 130억 | 2021 | 708억 |
| 1990 | 18.4억 | 2006 | 135억 | 2022 | 694억 |
| 1991 | 17.8억 | 2007 | 157억 | 2023 | 688억 |
| 1992 | 22.2억 | 2008 | 197억 | 2024 | 749억 |
| 1993 | 25.4억 | 2009 | 239억 | 2025 | 894억 |
| 1994 | 31.3억 | 2010 | 296억 | 2026 | 1,145억 |
| 1995 | 37.4억 | 2011 | 307억 | | |
| 1996 | 42.1억 | 2012 | 347억 | | |