| 年度 | 实际值 |
|---|---|
| 1978 | 362 |
| 1979 | 427 |
| 1980 | 530 |
| 1981 | 371 |
| 1982 | 724 |
| 1983 | 829 |
| 1984 | 740 |
| 1985 | 1182 |
| 1986 | 1166 |
| 1987 | 1028 |
| 1988 | 1059 |
| 1989 | 1077 |
| 1990 | 1208 |
| 1991 | 1117 |
| 1992 | 935 |
| 1993 | 1033 |
| 1994 | 1160 |
| 1995 | 1066 |
| 1996 | 1177 |
| 1997 | 1171 |
| 1998 | 1117 |
| 1999 | 1108 |
| 2000 | 857 |
| 2001 | 843 |
| 2002 | 1169 |
| 2003 | 912 |
| 2004 | 796 |
| 2005 | 665 |
| 2006 | 536 |
| 2007 | 325 |
| 2008 | 386 |
| 2009 | 392 |
| 2010 | 399 |
| 2011 | 405 |
| 2012 | 417 |
| 2013 | 445 |
| 2014 | 404 |
| 2015 | 1505 |