데이터 표
| 1990 | 24.3% | 1997 | 27.2% | 2004 | 27.1% |
| 1991 | 27.7% | 1998 | 26% | 2005 | 23.8% |
| 1992 | 26.9% | 1999 | 26.6% | 2006 | 25.2% |
| 1993 | 24.4% | 2000 | 26% | 2007 | 22.7% |
| 1994 | 24.3% | 2001 | 30.3% | 2008 | 20.1% |
| 1995 | 25.9% | 2002 | 26.5% | 2009 | 23.9% |
| 1996 | 24.9% | 2003 | 29.9% | 2010 | 20.8% |
데이터 표
| 1990 | 653억 | 1997 | 2,027억 | 2004 | 3,439억 |
| 1991 | 863억 | 1998 | 2,056억 | 2005 | 3,580억 |
| 1992 | 1,000억 | 1999 | 2,175억 | 2006 | 4,353억 |
| 1993 | 1,011억 | 2000 | 2,463억 | 2007 | 4,591억 |
| 1994 | 1,228억 | 2001 | 3,060억 | 2008 | 4,912억 |
| 1995 | 1,482억 | 2002 | 2,958억 | 2009 | 6,012억 |
| 1996 | 1,718억 | 2003 | 3,216억 | 2010 | 5,820억 |
데이터 표
| 1990 | 28.3% | 1997 | 29% | 2004 | 31.3% |
| 1991 | 34.3% | 1998 | 28.8% | 2005 | 28.2% |
| 1992 | 34.2% | 1999 | 28% | 2006 | 26.3% |
| 1993 | 29.4% | 2000 | 27.4% | 2007 | 25.7% |
| 1994 | 30.3% | 2001 | 28% | 2008 | 22.9% |
| 1995 | 29.8% | 2002 | 28.5% | 2009 | 26.7% |
| 1996 | 27.7% | 2003 | 32.6% | 2010 | 28.6% |
데이터 표
| 1990 | 758억 | 1997 | 2,160억 | 2004 | 3,969억 |
| 1991 | 1,068억 | 1998 | 2,279억 | 2005 | 4,245억 |
| 1992 | 1,270억 | 1999 | 2,296억 | 2006 | 4,546억 |
| 1993 | 1,217억 | 2000 | 2,592억 | 2007 | 5,194억 |
| 1994 | 1,531억 | 2001 | 2,827억 | 2008 | 5,613억 |
| 1995 | 1,699억 | 2002 | 3,184억 | 2009 | 6,741억 |
| 1996 | 1,913억 | 2003 | 3,506억 | 2010 | 7,995억 |