| 年度 | 实际值 |
|---|---|
| 1985 | 233 |
| 1986 | 474 |
| 1987 | 618 |
| 1988 | 883 |
| 1989 | 1801 |
| 1990 | 1435 |
| 1991 | 1938 |
| 1992 | 1744 |
| 1993 | 2572 |
| 1994 | 3551 |
| 1995 | 3129 |
| 1996 | 4396 |
| 1997 | 4023 |
| 1998 | 5781 |
| 1999 | 6813 |
| 2000 | 8661 |
| 2001 | 17823 |
| 2002 | 28829 |
| 2003 | 49488 |
| 2004 | 45005 |
| 2005 | 55172 |
| 2006 | 63380 |
| 2007 | 133295 |
| 2008 | 151639 |
| 2009 | 211776 |
| 2010 | 219477 |
| 2011 | 261843 |
| 2012 | 254970 |
| 2013 | 285330 |
| 2014 | 319973 |
| 2015 | 374031 |