| 年度 | 数值 | 单位 | 发布日期 |
| 1996 | 647 | 千吨 | 2026-9 |
| 1995 | 649 | 千吨 | 2026-9 |
| 1994 | 615 | 千吨 | 2026-9 |
| 1993 | 627 | 千吨 | 2026-9 |
| 1992 | 614 | 千吨 | 2026-9 |
| 1991 | 646 | 千吨 | 2026-9 |
| 1990 | 481 | 千吨 | 2026-9 |
| 1989 | 601 | 千吨 | 2026-9 |
| 1988 | 767 | 千吨 | 2026-9 |
| 1987 | 750 | 千吨 | 2026-9 |
| 1986 | 688 | 千吨 | 2026-9 |
| 1985 | 547 | 千吨 | 2026-9 |
| 1984 | 513 | 千吨 | 2026-9 |
| 1983 | 509 | 千吨 | 2026-9 |
| 1982 | 579 | 千吨 | 2026-9 |
| 1981 | 692 | 千吨 | 2026-9 |
| 1980 | 676 | 千吨 | 2026-9 |
| 1979 | 584 | 千吨 | 2026-9 |
| 1978 | 543 | 千吨 | 2026-9 |
| 1977 | 543 | 千吨 | 2026-9 |
| 1976 | 504 | 千吨 | 2026-9 |
| 1975 | 560 | 千吨 | 2026-9 |
| 1974 | 597 | 千吨 | 2026-9 |
| 1973 | 577 | 千吨 | 2026-9 |
| 1972 | 465 | 千吨 | 2026-9 |
| 1971 | 550 | 千吨 | 2026-9 |
| 1970 | 576 | 千吨 | 2026-9 |
| 1969 | 530 | 千吨 | 2026-9 |
| 1968 | 522 | 千吨 | 2026-9 |
| 1967 | 510 | 千吨 | 2026-9 |
| 1966 | 505 | 千吨 | 2026-9 |
| 1965 | 506 | 千吨 | 2026-9 |
| 1964 | 498 | 千吨 | 2026-9 |