| 年度 | 数值 | 单位 | 发布日期 |
| 1996 | 1186 | 千吨 | 2026-9 |
| 1995 | 1063 | 千吨 | 2026-9 |
| 1994 | 760 | 千吨 | 2026-9 |
| 1993 | 832 | 千吨 | 2026-9 |
| 1992 | 862 | 千吨 | 2026-9 |
| 1991 | 960 | 千吨 | 2026-9 |
| 1990 | 701 | 千吨 | 2026-9 |
| 1989 | 621 | 千吨 | 2026-9 |
| 1988 | 599 | 千吨 | 2026-9 |
| 1987 | 684 | 千吨 | 2026-9 |
| 1986 | 641 | 千吨 | 2026-9 |
| 1985 | 597 | 千吨 | 2026-9 |
| 1984 | 435 | 千吨 | 2026-9 |
| 1983 | 501 | 千吨 | 2026-9 |
| 1982 | 463 | 千吨 | 2026-9 |
| 1981 | 504 | 千吨 | 2026-9 |
| 1980 | 492 | 千吨 | 2026-9 |
| 1979 | 230 | 千吨 | 2026-9 |
| 1978 | 227 | 千吨 | 2026-9 |
| 1977 | 225 | 千吨 | 2026-9 |
| 1976 | 234 | 千吨 | 2026-9 |
| 1975 | 220 | 千吨 | 2026-9 |
| 1974 | 209 | 千吨 | 2026-9 |
| 1973 | 178 | 千吨 | 2026-9 |
| 1972 | 100 | 千吨 | 2026-9 |
| 1971 | 107 | 千吨 | 2026-9 |
| 1970 | 143 | 千吨 | 2026-9 |
| 1969 | 136 | 千吨 | 2026-9 |
| 1968 | 137 | 千吨 | 2026-9 |
| 1967 | 124 | 千吨 | 2026-9 |
| 1966 | 111 | 千吨 | 2026-9 |
| 1965 | 139 | 千吨 | 2026-9 |
| 1964 | 134 | 千吨 | 2026-9 |