| 序号 |
时间(年) |
数据(单位：美元) |
| 1 |
2019 |
|
| 2 |
2018 |
|
| 3 |
2017 |
|
| 4 |
2016 |
|
| 5 |
2015 |
|
| 6 |
2014 |
|
| 7 |
2013 |
6620.00 |
| 8 |
2012 |
6080.00 |
| 9 |
2011 |
5590.00 |
| 10 |
2010 |
5170.00 |
| 11 |
2009 |
5090.00 |
| 12 |
2008 |
5040.00 |
| 13 |
2007 |
4740.00 |
| 14 |
2006 |
4410.00 |
| 15 |
2005 |
3970.00 |
| 16 |
2004 |
3500.00 |
| 17 |
2003 |
3100.00 |
| 18 |
2002 |
2830.00 |
| 19 |
2001 |
2760.00 |
| 20 |
2000 |
2620.00 |
| 21 |
1999 |
2400.00 |
| 22 |
1998 |
2240.00 |
| 23 |
1997 |
2500.00 |
| 24 |
1996 |
2700.00 |
| 25 |
1995 |
2540.00 |
| 26 |
1994 |
2130.00 |
| 27 |
1993 |
1870.00 |
| 28 |
1992 |
2120.00 |
| 29 |
1991 |
2330.00 |
| 30 |
1990 |
2650.00 |
| 31 |
1989 |
2740.00 |
| 32 |
1988 |
2770.00 |
| 33 |
1987 |
2480.00 |
| 34 |
1986 |
2380.00 |
| 35 |
1985 |
2300.00 |
| 36 |
1984 |
2300.00 |
| 37 |
1983 |
2180.00 |
| 38 |
1982 |
2350.00 |
| 39 |
1981 |
2440.00 |
| 40 |
1980 |
2150.00 |
| 41 |
1979 |
2000.00 |
| 42 |
1978 |
1780.00 |
| 43 |
1977 |
1600.00 |
| 44 |
1976 |
1540.00 |
| 45 |
1975 |
1490.00 |
| 46 |
1974 |
1230.00 |
| 47 |
1973 |
1030.00 |
| 48 |
1972 |
830.00 |
