| 年度 | 数值 | 单位 | 发布日期 |
| 1996 | 654 | 千吨 | 2026-9 |
| 1995 | 648 | 千吨 | 2026-9 |
| 1994 | 656 | 千吨 | 2026-9 |
| 1993 | 645 | 千吨 | 2026-9 |
| 1992 | 646 | 千吨 | 2026-9 |
| 1991 | 636 | 千吨 | 2026-9 |
| 1990 | 650 | 千吨 | 2026-9 |
| 1989 | 631 | 千吨 | 2026-9 |
| 1988 | 606 | 千吨 | 2026-9 |
| 1987 | 597 | 千吨 | 2026-9 |
| 1986 | 567 | 千吨 | 2026-9 |
| 1985 | 569 | 千吨 | 2026-9 |
| 1984 | 588 | 千吨 | 2026-9 |
| 1983 | 593 | 千吨 | 2026-9 |
| 1982 | 590 | 千吨 | 2026-9 |
| 1981 | 566 | 千吨 | 2026-9 |
| 1980 | 578 | 千吨 | 2026-9 |
| 1979 | 551 | 千吨 | 2026-9 |
| 1978 | 542 | 千吨 | 2026-9 |
| 1977 | 506 | 千吨 | 2026-9 |
| 1976 | 504 | 千吨 | 2026-9 |
| 1975 | 503 | 千吨 | 2026-9 |
| 1974 | 488 | 千吨 | 2026-9 |
| 1973 | 513 | 千吨 | 2026-9 |
| 1972 | 503 | 千吨 | 2026-9 |
| 1971 | 448 | 千吨 | 2026-9 |
| 1970 | 422 | 千吨 | 2026-9 |
| 1969 | 401 | 千吨 | 2026-9 |
| 1968 | 381 | 千吨 | 2026-9 |
| 1967 | 425 | 千吨 | 2026-9 |
| 1966 | 454 | 千吨 | 2026-9 |
| 1965 | 398 | 千吨 | 2026-9 |
| 1964 | 351 | 千吨 | 2026-9 |