| 年度 | 实际值 |
|---|---|
| 1984 | 348 |
| 1985 | 417 |
| 1986 | 465 |
| 1987 | 529 |
| 1988 | 726 |
| 1989 | 848 |
| 1990 | 851 |
| 1991 | 940 |
| 1992 | 1103 |
| 1993 | 1327 |
| 1994 | 1889 |
| 1995 | 2631 |
| 1996 | 2817 |
| 1997 | 3040 |
| 1998 | 3314 |
| 1999 | 3367 |
| 2000 | 3589 |
| 2001 | 3798 |
| 2002 | 4124 |
| 2003 | 4362 |
| 2004 | 4620 |
| 2005 | 4992 |
| 2006 | 5682 |
| 2007 | 6609 |
| 2008 | 7288 |
| 2009 | 7799 |
| 2010 | 8939 |
| 2011 | 10280 |
| 2012 | 11568 |
| 2013 | 12737 |
| 2014 | 15471 |
| 2015 | 17023 |