데이터 표
| 1983 | 20% | 1998 | 19.9% | 2013 | 20.7% |
| 1984 | 23.1% | 1999 | 19.5% | 2014 | 20.8% |
| 1985 | 22.9% | 2000 | 20.8% | 2015 | 18.3% |
| 1986 | 23.1% | 2001 | 20.2% | 2016 | 16.1% |
| 1987 | 23.9% | 2002 | 19.1% | 2017 | 15.9% |
| 1988 | 19.5% | 2003 | 18.9% | 2018 | 17.7% |
| 1989 | 22.7% | 2004 | 21.5% | 2019 | 16.3% |
| 1990 | 22.5% | 2005 | 23.5% | 2020 | 14.7% |
| 1991 | 21.8% | 2006 | 24.8% | 2021 | 15.1% |
| 1992 | 18.5% | 2007 | 24.9% | 2022 | 16.6% |
| 1993 | 18.6% | 2008 | 22.5% | 2023 | 17.9% |
| 1994 | 18.3% | 2009 | 19.2% | 2024 | 17.5% |
| 1995 | 18.2% | 2010 | 21.5% | 2025 | 17.3% |
| 1996 | 19.6% | 2011 | 21.9% | 2026 | 18.2% |
| 1997 | 21.2% | 2012 | 21.2% | | |
데이터 표
| 1983 | 6.32억 | 1998 | 22.9억 | 2013 | 99억 |
| 1984 | 7.23억 | 1999 | 25.4억 | 2014 | 119억 |
| 1985 | 7.43억 | 2000 | 29.9억 | 2015 | 110억 |
| 1986 | 7.92억 | 2001 | 31.1억 | 2016 | 105억 |
| 1987 | 8.43억 | 2002 | 32.6억 | 2017 | 115억 |
| 1988 | 9.11억 | 2003 | 36.9억 | 2018 | 141억 |
| 1989 | 10.2억 | 2004 | 43.4억 | 2019 | 137억 |
| 1990 | 10.2억 | 2005 | 53.4억 | 2020 | 121억 |
| 1991 | 11.6억 | 2006 | 63.3억 | 2021 | 139억 |
| 1992 | 11.5억 | 2007 | 70.5억 | 2022 | 185억 |
| 1993 | 13.4억 | 2008 | 70.9억 | 2023 | 198억 |
| 1994 | 14.9억 | 2009 | 61.4억 | 2024 | 208억 |
| 1995 | 16.6억 | 2010 | 83.1억 | 2025 | 232억 |
| 1996 | 19.7억 | 2011 | 93.4억 | 2026 | 270억 |
| 1997 | 22.2억 | 2012 | 94.2억 | | |
데이터 표
| 1983 | 23% | 1998 | 20% | 2013 | 27.6% |
| 1984 | 24.2% | 1999 | 21.4% | 2014 | 27.1% |
| 1985 | 24.7% | 2000 | 20.5% | 2015 | 22.8% |
| 1986 | 25.5% | 2001 | 21.6% | 2016 | 20.9% |
| 1987 | 23.6% | 2002 | 20.8% | 2017 | 18.4% |
| 1988 | 19.1% | 2003 | 18.7% | 2018 | 20.3% |
| 1989 | 22.3% | 2004 | 19.4% | 2019 | 21.3% |
| 1990 | 24.5% | 2005 | 20.6% | 2020 | 23.5% |
| 1991 | 22.4% | 2006 | 19.4% | 2021 | 22% |
| 1992 | 22.8% | 2007 | 18% | 2022 | 21.9% |
| 1993 | 23.5% | 2008 | 19.8% | 2023 | 22.3% |
| 1994 | 19.3% | 2009 | 24.7% | 2024 | 20.9% |
| 1995 | 17.1% | 2010 | 18.4% | 2025 | 19.7% |
| 1996 | 17.6% | 2011 | 19.7% | 2026 | 19.3% |
| 1997 | 20.6% | 2012 | 22.4% | | |
데이터 표
| 1983 | 7.28억 | 1998 | 23.1억 | 2013 | 132억 |
| 1984 | 7.58억 | 1999 | 28억 | 2014 | 155억 |
| 1985 | 8.03억 | 2000 | 29.4억 | 2015 | 137억 |
| 1986 | 8.76억 | 2001 | 33.1억 | 2016 | 136억 |
| 1987 | 8.32억 | 2002 | 35.6억 | 2017 | 133억 |
| 1988 | 8.96억 | 2003 | 36.5억 | 2018 | 161억 |
| 1989 | 10억 | 2004 | 39.3억 | 2019 | 179억 |
| 1990 | 11.2억 | 2005 | 46.9억 | 2020 | 194억 |
| 1991 | 11.9억 | 2006 | 49.7억 | 2021 | 201억 |
| 1992 | 14.2억 | 2007 | 51억 | 2022 | 244억 |
| 1993 | 16.9억 | 2008 | 62.3억 | 2023 | 246억 |
| 1994 | 15.8억 | 2009 | 78.9억 | 2024 | 248억 |
| 1995 | 15.6억 | 2010 | 71.3억 | 2025 | 264억 |
| 1996 | 17.6억 | 2011 | 84억 | 2026 | 286억 |
| 1997 | 21.5억 | 2012 | 99.5억 | | |