데이터 표
| 1980 | 22.4% | 1996 | 20% | 2012 | 15.8% |
| 1981 | 22.8% | 1997 | 19.6% | 2013 | 16.1% |
| 1982 | 23.5% | 1998 | 21.9% | 2014 | 15.4% |
| 1983 | 21.3% | 1999 | 20.4% | 2015 | 15.6% |
| 1984 | 21.3% | 2000 | 27% | 2016 | 15.3% |
| 1985 | 21.4% | 2001 | 18.7% | 2017 | 15.3% |
| 1986 | 19.7% | 2002 | 16.8% | 2018 | 15.5% |
| 1987 | 19.4% | 2003 | 17.8% | 2019 | 15.5% |
| 1988 | 21.2% | 2004 | 16.6% | 2020 | 15.2% |
| 1989 | 22.9% | 2005 | 18.4% | 2021 | 15.3% |
| 1990 | 24.4% | 2006 | 17.3% | 2022 | 16.2% |
| 1991 | 20.9% | 2007 | 16.8% | 2023 | 16.5% |
| 1992 | 22.4% | 2008 | 17% | 2024 | 16.3% |
| 1993 | 22.8% | 2009 | 16.4% | 2025 | 15.9% |
| 1994 | 22.2% | 2010 | 15% | 2026 | 15.9% |
| 1995 | 21.1% | 2011 | 16.2% | | |
데이터 표
| 1980 | 3,407억 | 1996 | 1.6조 | 2012 | 2.32조 |
| 1981 | 4,117억 | 1997 | 1.7조 | 2013 | 2.46조 |
| 1982 | 4,545억 | 1998 | 2.05조 | 2014 | 2.51조 |
| 1983 | 4,611억 | 1999 | 2조 | 2015 | 2.66조 |
| 1984 | 5,159억 | 2000 | 2.78조 | 2016 | 2.69조 |
| 1985 | 5,426억 | 2001 | 1.9조 | 2017 | 2.75조 |
| 1986 | 5,848억 | 2002 | 1.79조 | 2018 | 2.85조 |
| 1987 | 6,502억 | 2003 | 1.95조 | 2019 | 2.93조 |
| 1988 | 7,654억 | 2004 | 1.93조 | 2020 | 3.04조 |
| 1989 | 9,216억 | 2005 | 2.22조 | 2021 | 3.32조 |
| 1990 | 1.09조 | 2006 | 2.18조 | 2022 | 3.69조 |
| 1991 | 1.05조 | 2007 | 2.24조 | 2023 | 3.89조 |
| 1992 | 1.26조 | 2008 | 2.23조 | 2024 | 4.18조 |
| 1993 | 1.42조 | 2009 | 2.11조 | 2025 | 4.55조 |
| 1994 | 1.5조 | 2010 | 2.12조 | 2026 | 4.86조 |
| 1995 | 1.56조 | 2011 | 2.31조 | | |
데이터 표
| 1980 | 24.8% | 1996 | 27.1% | 2012 | 20.1% |
| 1981 | 25.4% | 1997 | 27.1% | 2013 | 19.3% |
| 1982 | 26.2% | 1998 | 27.2% | 2014 | 18.2% |
| 1983 | 23.1% | 1999 | 22.8% | 2015 | 17.4% |
| 1984 | 22.9% | 2000 | 32.3% | 2016 | 17.5% |
| 1985 | 23.4% | 2001 | 24.3% | 2017 | 17.3% |
| 1986 | 21.5% | 2002 | 22.1% | 2018 | 17.3% |
| 1987 | 21.2% | 2003 | 22.2% | 2019 | 17.2% |
| 1988 | 22.8% | 2004 | 21.2% | 2020 | 18.1% |
| 1989 | 32.6% | 2005 | 20.9% | 2021 | 17.3% |
| 1990 | 28.4% | 2006 | 19.5% | 2022 | 17.9% |
| 1991 | 30.2% | 2007 | 19% | 2023 | 19% |
| 1992 | 29.2% | 2008 | 19.8% | 2024 | 17.7% |
| 1993 | 28.9% | 2009 | 22.6% | 2025 | 18% |
| 1994 | 28.4% | 2010 | 20.1% | 2026 | 18% |
| 1995 | 27.9% | 2011 | 20.2% | | |
데이터 표
| 1980 | 3,775억 | 1996 | 2.18조 | 2012 | 2.95조 |
| 1981 | 4,581억 | 1997 | 2.36조 | 2013 | 2.95조 |
| 1982 | 5,087억 | 1998 | 2.54조 | 2014 | 2.95조 |
| 1983 | 5,017억 | 1999 | 2.23조 | 2015 | 2.97조 |
| 1984 | 5,541억 | 2000 | 3.34조 | 2016 | 3.08조 |
| 1985 | 5,936억 | 2001 | 2.46조 | 2017 | 3.12조 |
| 1986 | 6,365억 | 2002 | 2.35조 | 2018 | 3.19조 |
| 1987 | 7,086억 | 2003 | 2.42조 | 2019 | 3.27조 |
| 1988 | 8,256억 | 2004 | 2.46조 | 2020 | 3.62조 |
| 1989 | 1.31조 | 2005 | 2.52조 | 2021 | 3.77조 |
| 1990 | 1.27조 | 2006 | 2.45조 | 2022 | 4.08조 |
| 1991 | 1.51조 | 2007 | 2.54조 | 2023 | 4.48조 |
| 1992 | 1.64조 | 2008 | 2.59조 | 2024 | 4.56조 |
| 1993 | 1.79조 | 2009 | 2.91조 | 2025 | 5.16조 |
| 1994 | 1.92조 | 2010 | 2.83조 | 2026 | 5.51조 |
| 1995 | 2.06조 | 2011 | 2.88조 | | |