| 年度 | 数值 | 单位 | 发布日期 |
| 1996 | 389 | 千吨 | 2026-9 |
| 1995 | 403 | 千吨 | 2026-9 |
| 1994 | 397 | 千吨 | 2026-9 |
| 1993 | 406 | 千吨 | 2026-9 |
| 1992 | 476 | 千吨 | 2026-9 |
| 1991 | 489 | 千吨 | 2026-9 |
| 1990 | 595 | 千吨 | 2026-9 |
| 1989 | 519 | 千吨 | 2026-9 |
| 1988 | 607 | 千吨 | 2026-9 |
| 1987 | 658 | 千吨 | 2026-9 |
| 1986 | 753 | 千吨 | 2026-9 |
| 1985 | 671 | 千吨 | 2026-9 |
| 1984 | 832 | 千吨 | 2026-9 |
| 1983 | 864 | 千吨 | 2026-9 |
| 1982 | 713 | 千吨 | 2026-9 |
| 1981 | 706 | 千吨 | 2026-9 |
| 1980 | 718 | 千吨 | 2026-9 |
| 1979 | 742 | 千吨 | 2026-9 |
| 1978 | 796 | 千吨 | 2026-9 |
| 1977 | 966 | 千吨 | 2026-9 |
| 1976 | 850 | 千吨 | 2026-9 |
| 1975 | 539 | 千吨 | 2026-9 |
| 1974 | 673 | 千吨 | 2026-9 |
| 1973 | 665 | 千吨 | 2026-9 |
| 1972 | 621 | 千吨 | 2026-9 |
| 1971 | 674 | 千吨 | 2026-9 |
| 1970 | 744 | 千吨 | 2026-9 |
| 1969 | 671 | 千吨 | 2026-9 |
| 1968 | 618 | 千吨 | 2026-9 |
| 1967 | 472 | 千吨 | 2026-9 |
| 1966 | 416 | 千吨 | 2026-9 |
| 1965 | 325 | 千吨 | 2026-9 |
| 1964 | 256 | 千吨 | 2026-9 |