데이터 표
| 1985 | 70.9% | 1999 | 25.9% | 2013 | 43.9% |
| 1986 | 46.5% | 2000 | 44.4% | 2014 | 35.3% |
| 1987 | 33.7% | 2001 | 38.1% | 2015 | 25.6% |
| 1988 | 33.5% | 2002 | 36.8% | 2016 | 23.1% |
| 1989 | 31.5% | 2003 | 38.9% | 2017 | 22.7% |
| 1990 | 30.3% | 2004 | 41.7% | 2018 | 30% |
| 1991 | 29.6% | 2005 | 45.1% | 2019 | 28% |
| 1992 | 25.8% | 2006 | 47.8% | 2020 | 16.6% |
| 1993 | 25.2% | 2007 | 32.4% | 2021 | 21.7% |
| 1994 | 24.5% | 2008 | 63.3% | 2022 | 25.9% |
| 1995 | 24.2% | 2009 | 38.4% | 2023 | 21.5% |
| 1996 | 28.2% | 2010 | 36.8% | 2024 | 17.4% |
| 1997 | 27.2% | 2011 | 51.5% | 2025 | 16.5% |
| 1998 | 21.4% | 2012 | 50.7% | 2026 | 18.4% |
데이터 표
| 1980 | 62.7억 | 1996 | 28.6억 | 2012 | 121억 |
| 1981 | 84.6억 | 1997 | 28.4억 | 2013 | 99.3억 |
| 1982 | 78.7억 | 1998 | 19.2억 | 2014 | 76.4억 |
| 1983 | 77.5억 | 1999 | 25.4억 | 2015 | 45.5억 |
| 1984 | 73.5억 | 2000 | 50.8억 | 2016 | 36.4억 |
| 1985 | 75.3억 | 2001 | 42.3억 | 2017 | 38.1억 |
| 1986 | 33.3억 | 2002 | 42.7억 | 2018 | 54.9억 |
| 1987 | 27.5억 | 2003 | 49.3억 | 2019 | 51.4억 |
| 1988 | 24.9억 | 2004 | 61.5억 | 2020 | 27.5억 |
| 1989 | 25.3억 | 2005 | 79.2억 | 2021 | 40.9억 |
| 1990 | 27.1억 | 2006 | 96.5억 | 2022 | 59.5억 |
| 1991 | 26.9억 | 2007 | 66.4억 | 2023 | 43.6억 |
| 1992 | 23.3억 | 2008 | 143억 | 2024 | 35.7억 |
| 1993 | 22.7억 | 2009 | 66.5억 | 2025 | 34.5억 |
| 1994 | 22.5억 | 2010 | 68.7억 | 2026 | 40억 |
| 1995 | 24.5억 | 2011 | 120억 | | |
데이터 표
| 1985 | 40.6% | 1999 | 44.1% | 2013 | 33.4% |
| 1986 | 40% | 2000 | 37.5% | 2014 | 34% |
| 1987 | 30.3% | 2001 | 35.5% | 2015 | 37% |
| 1988 | 36.6% | 2002 | 41.4% | 2016 | 39.8% |
| 1989 | 36.2% | 2003 | 30.9% | 2017 | 36.6% |
| 1990 | 32% | 2004 | 33.2% | 2018 | 32.9% |
| 1991 | 30.6% | 2005 | 29.1% | 2019 | 32.1% |
| 1992 | 34.1% | 2006 | 28% | 2020 | 32.8% |
| 1993 | 38% | 2007 | 29.3% | 2021 | 30.1% |
| 1994 | 47.1% | 2008 | 27.2% | 2022 | 26.1% |
| 1995 | 44% | 2009 | 34.8% | 2023 | 30.1% |
| 1996 | 36.9% | 2010 | 25.5% | 2024 | 30.3% |
| 1997 | 39% | 2011 | 29.9% | 2025 | 29.9% |
| 1998 | 45.4% | 2012 | 31.1% | 2026 | 29.1% |
데이터 표
| 1980 | 11.4억 | 1996 | 37.4억 | 2012 | 74.1억 |
| 1981 | 13.8억 | 1997 | 40.8억 | 2013 | 75.7억 |
| 1982 | 21.7억 | 1998 | 40.7억 | 2014 | 73.7억 |
| 1983 | 56.3억 | 1999 | 43.2억 | 2015 | 65.8억 |
| 1984 | 41.4억 | 2000 | 43억 | 2016 | 62.7억 |
| 1985 | 43.2억 | 2001 | 39.5억 | 2017 | 61.2억 |
| 1986 | 28.7억 | 2002 | 48억 | 2018 | 60.2억 |
| 1987 | 24.7억 | 2003 | 39.1억 | 2019 | 59.1억 |
| 1988 | 27.1억 | 2004 | 48.9억 | 2020 | 54.4억 |
| 1989 | 29억 | 2005 | 51.1억 | 2021 | 56.6억 |
| 1990 | 28.5억 | 2006 | 56.5억 | 2022 | 60.1억 |
| 1991 | 27.8억 | 2007 | 60억 | 2023 | 61.1억 |
| 1992 | 30.7억 | 2008 | 61.4억 | 2024 | 62.1억 |
| 1993 | 34.3억 | 2009 | 60.3억 | 2025 | 62.4억 |
| 1994 | 43.1억 | 2010 | 47.6억 | 2026 | 63.4억 |
| 1995 | 44.6억 | 2011 | 69.7억 | | |