| 序号 |
时间(年) |
数据(单位：亿美元) |
| 1 |
2019 |
|
| 2 |
2018 |
|
| 3 |
2017 |
|
| 4 |
2016 |
|
| 5 |
2015 |
|
| 6 |
2014 |
|
| 7 |
2013 |
1.94 |
| 8 |
2012 |
1.58 |
| 9 |
2011 |
1.55 |
| 10 |
2010 |
1.81 |
| 11 |
2009 |
2.11 |
| 12 |
2008 |
1.31 |
| 13 |
2007 |
0.92 |
| 14 |
2006 |
1.32 |
| 15 |
2005 |
1.45 |
| 16 |
2004 |
1.53 |
| 17 |
2003 |
1.37 |
| 18 |
2002 |
1.27 |
| 19 |
2001 |
1.22 |
| 20 |
2000 |
1.36 |
| 21 |
1999 |
1.40 |
| 22 |
1998 |
1.49 |
| 23 |
1997 |
1.82 |
| 24 |
1996 |
2.36 |
| 25 |
1995 |
2.38 |
| 26 |
1994 |
2.14 |
| 27 |
1993 |
1.16 |
| 28 |
1992 |
1.04 |
| 29 |
1991 |
1.07 |
| 30 |
1990 |
1.23 |
| 31 |
1989 |
1.18 |
| 32 |
1988 |
1.13 |
| 33 |
1987 |
1.02 |
| 34 |
1986 |
0.70 |
| 35 |
1985 |
0.53 |
| 36 |
1984 |
0.56 |
| 37 |
1983 |
0.51 |
| 38 |
1982 |
0.52 |
| 39 |
1981 |
0.74 |
| 40 |
1980 |
0.62 |
| 41 |
1979 |
0.50 |
| 42 |
1978 |
0.26 |
| 43 |
1977 |
0.26 |
| 44 |
1976 |
0.19 |
| 45 |
1975 |
0.04 |
| 46 |
1974 |
0.02 |
| 47 |
1973 |
0.02 |
| 48 |
1972 |
0.02 |
| 49 |
1971 |
0.00 |
| 50 |
1970 |
0.01 |
| 51 |
1969 |
0.01 |
| 52 |
1968 |
0.05 |
| 53 |
1967 |
0.05 |
| 54 |
1966 |
0.06 |
| 55 |
1965 |
0.10 |
| 56 |
1964 |
0.07 |
| 57 |
1963 |
0.02 |
| 58 |
1962 |
0.01 |
