| 年度 | 实际值 |
|---|---|
| 1993 | 1482 |
| 1994 | 2025 |
| 1995 | 1570 |
| 1996 | 1905 |
| 1997 | 2170 |
| 1998 | 1886 |
| 1999 | 1962 |
| 2000 | 1894 |
| 2001 | 1996 |
| 2002 | 1872 |
| 2003 | 1875 |
| 2004 | 1625 |
| 2005 | 2628 |
| 2006 | 1559 |
| 2007 | 1467 |
| 2008 | 1418 |
| 2009 | |
| 2010 | 1496 |
| 2011 | 2174 |
| 2012 | 2342 |
| 2013 | 2668 |
| 2014 | 2959 |
| 2015 | 3626 |
| 2016 | 3974 |
| 2017 | 4228 |
| 2018 | 4135 |