| 序号 | 时间 (年) |
数据 (美元) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 4840.00 |
| 8 | 2014 | 4750.00 |
| 9 | 2013 | 4470.00 |
| 10 | 2012 | 3930.00 |
| 11 | 2011 | 3590.00 |
| 12 | 2010 | 3470.00 |
| 13 | 2009 | 3650.00 |
| 14 | 2008 | 3760.00 |
| 15 | 2007 | 3560.00 |
| 16 | 2006 | 3370.00 |
| 17 | 2005 | 3350.00 |
| 18 | 2004 | 2850.00 |
| 19 | 2003 | 2290.00 |
| 20 | 2002 | 2070.00 |
| 21 | 2001 | 2070.00 |
| 22 | 2000 | 2170.00 |
| 23 | 1999 | 2300.00 |
| 24 | 1998 | 2250.00 |
| 25 | 1997 | 2540.00 |
| 26 | 1996 | 2620.00 |
| 27 | 1995 | 2410.00 |
| 28 | 1994 | 2160.00 |
| 29 | 1993 | 2000.00 |
| 30 | 1992 | 1880.00 |
| 31 | 1991 | 1680.00 |
| 32 | 1990 | 1670.00 |
| 33 | 1989 | 1680.00 |
| 34 | 1988 | 1690.00 |
| 35 | 1987 | 1690.00 |
| 36 | 1986 | 1730.00 |
| 37 | 1985 | 1550.00 |
| 38 | 1984 | 1640.00 |
| 39 | 1983 | 1570.00 |
| 40 | 1982 | 1780.00 |
| 41 | 1981 | 2010.00 |
| 42 | 1980 | 1840.00 |
| 43 | 1979 | 1640.00 |
| 44 | 1978 | 1360.00 |
| 45 | 1977 | 1290.00 |
| 46 | 1976 | 1230.00 |
| 47 | 1975 | 1120.00 |
| 48 | 1974 | 930.00 |
| 49 | 1973 | 710.00 |
| 50 | 1972 | 520.00 |
| 51 | 1971 | 440.00 |
| 52 | 1970 | 390.00 |
| 53 | 1969 | 340.00 |
| 54 | 1968 | 340.00 |
| 55 | 1967 | 340.00 |
| 56 | 1966 | 300.00 |
| 57 | 1965 | 290.00 |
| 58 | 1964 | 300.00 |
| 59 | 1963 | 280.00 |
| 60 | 1962 | 280.00 |
