| 序号 |
时间(年) |
数据(单位：亿美元) |
| 1 |
2020 |
|
| 2 |
2019 |
|
| 3 |
2018 |
|
| 4 |
2017 |
|
| 5 |
2016 |
|
| 6 |
2015 |
|
| 7 |
2014 |
75.29 |
| 8 |
2013 |
72.89 |
| 9 |
2012 |
71.52 |
| 10 |
2011 |
63.45 |
| 11 |
2010 |
51.62 |
| 12 |
2009 |
42.66 |
| 13 |
2008 |
30.42 |
| 14 |
1991 |
5.76 |
| 15 |
1990 |
6.38 |
| 16 |
1989 |
6.31 |
| 17 |
1988 |
6.57 |
| 18 |
1987 |
7.47 |
| 19 |
1986 |
6.36 |
| 20 |
1985 |
6.11 |
| 21 |
1984 |
5.26 |
| 22 |
1983 |
5.82 |
| 23 |
1982 |
6.99 |
| 24 |
1981 |
6.58 |
| 25 |
1980 |
9.40 |
| 26 |
1979 |
9.35 |
| 27 |
1978 |
6.05 |
| 28 |
1977 |
4.31 |
| 29 |
1976 |
2.57 |
| 30 |
1975 |
2.17 |
| 31 |
1974 |
2.01 |
| 32 |
1973 |
1.26 |
| 33 |
1972 |
0.81 |
| 34 |
1971 |
0.68 |
| 35 |
1970 |
0.49 |
| 36 |
1969 |
0.41 |
| 37 |
1968 |
0.46 |
| 38 |
1967 |
0.39 |
| 39 |
1966 |
0.47 |
| 40 |
1965 |
0.45 |
| 41 |
1964 |
0.45 |
| 42 |
1963 |
0.46 |
| 43 |
1962 |
0.41 |
| 44 |
1961 |
0.42 |
| 45 |
1960 |
0.51 |
