| 年度 | 实际值 |
|---|---|
| 1978 | 627 |
| 1979 | |
| 1980 | 1544 |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 1850 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 3682 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 13576 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 45241 |
| 2000 | 50849 |
| 2001 | 40829 |
| 2002 | 93409 |
| 2003 | 103704 |
| 2004 | 124181 |
| 2005 | 127554 |
| 2006 | 146137 |
| 2007 | 210271 |
| 2008 | 298295 |
| 2009 | 485591 |
| 2010 | 775528 |