데이터 표
| 1980 | 28.2% | 1996 | 37% | 2012 | 37.7% |
| 1981 | 28.9% | 1997 | 37.6% | 2013 | 38.7% |
| 1982 | 29.4% | 1998 | 38.4% | 2014 | 39% |
| 1983 | 31.2% | 1999 | 38.7% | 2015 | 38.4% |
| 1984 | 31.3% | 2000 | 38% | 2016 | 37.9% |
| 1985 | 33% | 2001 | 38% | 2017 | 38% |
| 1986 | 33.6% | 2002 | 38.3% | 2018 | 38.9% |
| 1987 | 35.3% | 2003 | 38% | 2019 | 39% |
| 1988 | 35.3% | 2004 | 38.7% | 2020 | 41.4% |
| 1989 | 37.1% | 2005 | 39.7% | 2021 | 42.8% |
| 1990 | 37.2% | 2006 | 40.5% | 2022 | 41.7% |
| 1991 | 38% | 2007 | 41.1% | 2023 | 42.1% |
| 1992 | 39.6% | 2008 | 36.8% | 2024 | 42.3% |
| 1993 | 39.4% | 2009 | 34.8% | 2025 | 42.2% |
| 1994 | 38.5% | 2010 | 36.4% | 2026 | 43.2% |
| 1995 | 37.3% | 2011 | 36.2% | | |
데이터 표
| 1980 | 280억 | 1996 | 1,809억 | 2012 | 3,910억 |
| 1981 | 328억 | 1997 | 1,953억 | 2013 | 3,966억 |
| 1982 | 382억 | 1998 | 2,131억 | 2014 | 4,050억 |
| 1983 | 463억 | 1999 | 2,305억 | 2015 | 4,176억 |
| 1984 | 521억 | 2000 | 2,458억 | 2016 | 4,253억 |
| 1985 | 612억 | 2001 | 2,661억 | 2017 | 4,440억 |
| 1986 | 711억 | 2002 | 2,872억 | 2018 | 4,721억 |
| 1987 | 832억 | 2003 | 3,049억 | 2019 | 4,885억 |
| 1988 | 924억 | 2004 | 3,328억 | 2020 | 4,676억 |
| 1989 | 1,090억 | 2005 | 3,683억 | 2021 | 5,292억 |
| 1990 | 1,217억 | 2006 | 4,071억 | 2022 | 5,740억 |
| 1991 | 1,366억 | 2007 | 4,425억 | 2023 | 6,302억 |
| 1992 | 1,532억 | 2008 | 4,091억 | 2024 | 6,737억 |
| 1993 | 1,588억 | 2009 | 3,738억 | 2025 | 7,114억 |
| 1994 | 1,646억 | 2010 | 3,916억 | 2026 | 7,666억 |
| 1995 | 1,719억 | 2011 | 3,874억 | | |
데이터 표
| 1980 | 30.2% | 1996 | 42.9% | 2012 | 49.2% |
| 1981 | 31.3% | 1997 | 41.5% | 2013 | 46.2% |
| 1982 | 34.9% | 1998 | 41% | 2014 | 45.1% |
| 1983 | 35.9% | 1999 | 40% | 2015 | 43.7% |
| 1984 | 36.7% | 2000 | 39.1% | 2016 | 42.1% |
| 1985 | 39.8% | 2001 | 38.4% | 2017 | 41% |
| 1986 | 39.6% | 2002 | 38.6% | 2018 | 41.5% |
| 1987 | 38.5% | 2003 | 38.4% | 2019 | 42% |
| 1988 | 38.7% | 2004 | 38.8% | 2020 | 51.4% |
| 1989 | 40.1% | 2005 | 38.4% | 2021 | 49.5% |
| 1990 | 41.1% | 2006 | 38.4% | 2022 | 46.3% |
| 1991 | 42.6% | 2007 | 39.2% | 2023 | 45.4% |
| 1992 | 43.9% | 2008 | 41.3% | 2024 | 45.5% |
| 1993 | 46.3% | 2009 | 46.1% | 2025 | 44.7% |
| 1994 | 44.8% | 2010 | 45.8% | 2026 | 45.3% |
| 1995 | 44.1% | 2011 | 45.9% | | |
데이터 표
| 1980 | 300억 | 1996 | 2,096억 | 2012 | 5,101억 |
| 1981 | 355억 | 1997 | 2,153억 | 2013 | 4,735억 |
| 1982 | 453억 | 1998 | 2,277억 | 2014 | 4,681억 |
| 1983 | 533억 | 1999 | 2,379억 | 2015 | 4,749억 |
| 1984 | 611억 | 2000 | 2,534억 | 2016 | 4,732억 |
| 1985 | 738억 | 2001 | 2,693억 | 2017 | 4,803억 |
| 1986 | 837억 | 2002 | 2,896억 | 2018 | 5,034억 |
| 1987 | 909억 | 2003 | 3,079억 | 2019 | 5,267억 |
| 1988 | 1,013억 | 2004 | 3,336억 | 2020 | 5,808억 |
| 1989 | 1,178억 | 2005 | 3,569억 | 2021 | 6,115억 |
| 1990 | 1,345억 | 2006 | 3,858억 | 2022 | 6,371억 |
| 1991 | 1,531억 | 2007 | 4,222억 | 2023 | 6,802억 |
| 1992 | 1,697억 | 2008 | 4,598억 | 2024 | 7,250억 |
| 1993 | 1,866억 | 2009 | 4,944억 | 2025 | 7,535억 |
| 1994 | 1,916억 | 2010 | 4,938억 | 2026 | 8,033억 |
| 1995 | 2,031억 | 2011 | 4,910억 | | |