| 年份 |
进口数量
(公吨) |
进口金额
(1000美元) |
出口数量
(公吨) |
出口金额
（1000美元) |
| 1961 |
3,881,700 |
283,000 |
121,400 |
8,850 |
| 1962 |
3,535,600 |
268,000 |
89,100 |
6,760 |
| 1963 |
5,587,700 |
419,000 |
109,900 |
8,790 |
| 1964 |
5,368,700 |
424,000 |
110,800 |
9,450 |
| 1965 |
6,072,700 |
455,000 |
0 |
0 |
| 1966 |
6,213,800 |
466,000 |
0 |
0 |
| 1967 |
4,394,600 |
339,000 |
0 |
0 |
| 1968 |
4,451,400 |
334,000 |
0 |
0 |
| 1969 |
3,740,200 |
247,000 |
0 |
0 |
| 1970 |
5,302,100 |
371,000 |
0 |
0 |
| 1971 |
3,022,000 |
227,000 |
0 |
0 |
| 1972 |
4,333,600 |
351,000 |
0 |
0 |
| 1973 |
6,298,500 |
655,000 |
0 |
0 |
| 1974 |
5,383,400 |
1,157,000 |
0 |
0 |
| 1975 |
3,491,200 |
667,000 |
0 |
0 |
| 1976 |
2,021,900 |
340,000 |
0 |
0 |
| 1977 |
6,875,800 |
1,175,800 |
0 |
0 |
| 1978 |
7,667,300 |
1,343,000 |
0 |
0 |
| 1979 |
8,709,800 |
1,742,000 |
0 |
0 |
| 1980 |
10,971,700 |
2,436,000 |
0 |
0 |
| 1981 |
13,070,100 |
2,822,600 |
0 |
0 |
| 1982 |
13,796,600 |
2,882,227 |
0 |
0 |
| 1983 |
11,110,000 |
2,070,840 |
0 |
0 |
| 1984 |
9,870,000 |
1,712,380 |
0 |
0 |
| 1985 |
5,380,000 |
885,977 |
0 |
0 |
| 1986 |
6,114,449 |
815,157 |
5,129 |
570 |
| 1987 |
13,200,875 |
1,362,381 |
6,756 |
748 |
| 1988 |
14,546,510 |
1,731,038 |
6,700 |
885 |
| 1989 |
14,880,448 |
2,581,207 |
1,268 |
239 |
| 1990 |
12,527,317 |
2,156,528 |
3,152 |
559 |
| 1991 |
12,367,665 |
1,459,542 |
1,709 |
265 |
| 1992 |
10,581,324 |
1,503,726 |
2,735 |
296 |
| 1993 |
6,423,919 |
834,076 |
86,874 |
8,238 |
| 1994 |
7,299,283 |
960,577 |
107,114 |
10,055 |
| 1995 |
11,590,000 |
2,026,390 |
16,189 |
1,556 |
| 1996 |
8,245,961 |
1,890,396 |
0 |
0 |
| 1997 |
1,860,612 |
368,285 |
710 |
108 |
| 1998 |
1,489,403 |
278,570 |
6,020 |
1,413 |
| 1999 |
448,121 |
85,654 |
932 |
222 |
|
|
