| 年度 | 数值 | 单位 | 发布日期 |
| 1996 | 381 | 千吨 | 2026-9 |
| 1995 | 360 | 千吨 | 2026-9 |
| 1994 | 333 | 千吨 | 2026-9 |
| 1993 | 375 | 千吨 | 2026-9 |
| 1992 | 453 | 千吨 | 2026-9 |
| 1991 | 423 | 千吨 | 2026-9 |
| 1990 | 298 | 千吨 | 2026-9 |
| 1989 | 385 | 千吨 | 2026-9 |
| 1988 | 819 | 千吨 | 2026-9 |
| 1987 | 590 | 千吨 | 2026-9 |
| 1986 | 406 | 千吨 | 2026-9 |
| 1985 | 471 | 千吨 | 2026-9 |
| 1984 | 592 | 千吨 | 2026-9 |
| 1983 | 546 | 千吨 | 2026-9 |
| 1982 | 382 | 千吨 | 2026-9 |
| 1981 | 340 | 千吨 | 2026-9 |
| 1980 | 532 | 千吨 | 2026-9 |
| 1979 | 633 | 千吨 | 2026-9 |
| 1978 | 519 | 千吨 | 2026-9 |
| 1977 | 250 | 千吨 | 2026-9 |
| 1976 | 115 | 千吨 | 2026-9 |
| 1975 | 149 | 千吨 | 2026-9 |
| 1974 | 179 | 千吨 | 2026-9 |
| 1973 | 201 | 千吨 | 2026-9 |
| 1972 | 191 | 千吨 | 2026-9 |
| 1971 | 209 | 千吨 | 2026-9 |
| 1970 | 155 | 千吨 | 2026-9 |
| 1969 | 84 | 千吨 | 2026-9 |
| 1968 | 139 | 千吨 | 2026-9 |
| 1967 | 128 | 千吨 | 2026-9 |
| 1966 | 74 | 千吨 | 2026-9 |
| 1965 | 20 | 千吨 | 2026-9 |
| 1964 | 9 | 千吨 | 2026-9 |