| 年度 | 实际值 |
|---|---|
| 1984 | 324 |
| 1985 | 495 |
| 1986 | 596 |
| 1987 | 750 |
| 1988 | 1045 |
| 1989 | 1213 |
| 1990 | 1440 |
| 1991 | 1667 |
| 1992 | 1731 |
| 1993 | 2267 |
| 1994 | 2998 |
| 1995 | 3900 |
| 1996 | 4823 |
| 1997 | 5264 |
| 1998 | 5605 |
| 1999 | 5927 |
| 2000 | 6236 |
| 2001 | 7486 |
| 2002 | 6591 |
| 2003 | 6976 |
| 2004 | 7484 |
| 2005 | 8188 |
| 2006 | 9286 |
| 2007 | 10568 |
| 2008 | 11878 |
| 2009 | 12732 |
| 2010 | 14265 |
| 2011 | 16426 |
| 2012 | 18283 |
| 2013 | 20019 |
| 2014 | 23708 |
| 2015 | 25929 |