데이터 표
| 1980 | 54.2% | 1996 | 56.9% | 2012 | 49.1% |
| 1981 | 57.7% | 1997 | 56.3% | 2013 | 49.7% |
| 1982 | 57.8% | 1998 | 56.4% | 2014 | 48.9% |
| 1983 | 58.9% | 1999 | 55.8% | 2015 | 49.1% |
| 1984 | 58.3% | 2000 | 55.3% | 2016 | 50.4% |
| 1985 | 58.8% | 2001 | 53.1% | 2017 | 50.5% |
| 1986 | 60.2% | 2002 | 51.2% | 2018 | 50.4% |
| 1987 | 61.6% | 2003 | 51.7% | 2019 | 49.2% |
| 1988 | 60.2% | 2004 | 51.8% | 2020 | 48.8% |
| 1989 | 60.2% | 2005 | 53.3% | 2021 | 49.2% |
| 1990 | 61.2% | 2006 | 52.3% | 2022 | 49.3% |
| 1991 | 61.5% | 2007 | 51.8% | 2023 | 48.3% |
| 1992 | 58% | 2008 | 51.3% | 2024 | 47.8% |
| 1993 | 57.1% | 2009 | 50.8% | 2025 | 48% |
| 1994 | 56.5% | 2010 | 49.6% | 2026 | 47% |
| 1995 | 55.1% | 2011 | 48.7% | | |
데이터 표
| 1980 | 3,210억 | 1996 | 1.11조 | 2012 | 1.83조 |
| 1981 | 3,741억 | 1997 | 1.15조 | 2013 | 1.89조 |
| 1982 | 4,103억 | 1998 | 1.22조 | 2014 | 1.94조 |
| 1983 | 4,684억 | 1999 | 1.27조 | 2015 | 2.08조 |
| 1984 | 5,208억 | 2000 | 1.33조 | 2016 | 2.21조 |
| 1985 | 5,717억 | 2001 | 1.33조 | 2017 | 2.31조 |
| 1986 | 6,407억 | 2002 | 1.33조 | 2018 | 2.41조 |
| 1987 | 7,104억 | 2003 | 1.4조 | 2019 | 2.47조 |
| 1988 | 7,593억 | 2004 | 1.47조 | 2020 | 2.45조 |
| 1989 | 8,404억 | 2005 | 1.56조 | 2021 | 2.66조 |
| 1990 | 9,399억 | 2006 | 1.63조 | 2022 | 2.87조 |
| 1991 | 1.01조 | 2007 | 1.72조 | 2023 | 2.97조 |
| 1992 | 9,543억 | 2008 | 1.74조 | 2024 | 3.06조 |
| 1993 | 9,444억 | 2009 | 1.69조 | 2025 | 3.15조 |
| 1994 | 9,972억 | 2010 | 1.76조 | 2026 | 3.22조 |
| 1995 | 1.05조 | 2011 | 1.8조 | | |
데이터 표
| 1980 | 59.5% | 1996 | 60% | 2012 | 50.2% |
| 1981 | 62.1% | 1997 | 57.9% | 2013 | 51.4% |
| 1982 | 64% | 1998 | 55.6% | 2014 | 50.7% |
| 1983 | 63.7% | 1999 | 55.2% | 2015 | 49.4% |
| 1984 | 61% | 2000 | 52.2% | 2016 | 49.5% |
| 1985 | 62.1% | 2001 | 51.7% | 2017 | 49.2% |
| 1986 | 60.2% | 2002 | 52.7% | 2018 | 49.8% |
| 1987 | 58% | 2003 | 53% | 2019 | 48.8% |
| 1988 | 56.6% | 2004 | 51.7% | 2020 | 52% |
| 1989 | 56.6% | 2005 | 51.2% | 2021 | 49.3% |
| 1990 | 57.5% | 2006 | 50.1% | 2022 | 48.3% |
| 1991 | 61.2% | 2007 | 48.5% | 2023 | 48.9% |
| 1992 | 66.5% | 2008 | 49.4% | 2024 | 49.3% |
| 1993 | 67.9% | 2009 | 51.7% | 2025 | 49.4% |
| 1994 | 65.3% | 2010 | 49.7% | 2026 | 49.4% |
| 1995 | 62.1% | 2011 | 49.1% | | |
데이터 표
| 1980 | 3,527억 | 1996 | 1.18조 | 2012 | 1.87조 |
| 1981 | 4,020억 | 1997 | 1.19조 | 2013 | 1.95조 |
| 1982 | 4,543억 | 1998 | 1.2조 | 2014 | 2.01조 |
| 1983 | 5,061억 | 1999 | 1.25조 | 2015 | 2.09조 |
| 1984 | 5,446억 | 2000 | 1.26조 | 2016 | 2.18조 |
| 1985 | 6,037억 | 2001 | 1.3조 | 2017 | 2.25조 |
| 1986 | 6,406억 | 2002 | 1.37조 | 2018 | 2.38조 |
| 1987 | 6,685억 | 2003 | 1.43조 | 2019 | 2.45조 |
| 1988 | 7,135억 | 2004 | 1.46조 | 2020 | 2.61조 |
| 1989 | 7,906억 | 2005 | 1.5조 | 2021 | 2.67조 |
| 1990 | 8,832억 | 2006 | 1.56조 | 2022 | 2.81조 |
| 1991 | 1.01조 | 2007 | 1.61조 | 2023 | 3조 |
| 1992 | 1.09조 | 2008 | 1.68조 | 2024 | 3.15조 |
| 1993 | 1.12조 | 2009 | 1.72조 | 2025 | 3.25조 |
| 1994 | 1.15조 | 2010 | 1.77조 | 2026 | 3.39조 |
| 1995 | 1.18조 | 2011 | 1.82조 | | |