| 年度 | 数值 | 单位 | 发布日期 |
| 1996 | 298 | 千吨 | 2026-9 |
| 1995 | 311 | 千吨 | 2026-9 |
| 1994 | 286 | 千吨 | 2026-9 |
| 1993 | 321 | 千吨 | 2026-9 |
| 1992 | 290 | 千吨 | 2026-9 |
| 1991 | 285 | 千吨 | 2026-9 |
| 1990 | 293 | 千吨 | 2026-9 |
| 1989 | 275 | 千吨 | 2026-9 |
| 1988 | 258 | 千吨 | 2026-9 |
| 1987 | 271 | 千吨 | 2026-9 |
| 1986 | 252 | 千吨 | 2026-9 |
| 1985 | 253 | 千吨 | 2026-9 |
| 1984 | 293 | 千吨 | 2026-9 |
| 1983 | 249 | 千吨 | 2026-9 |
| 1982 | 245 | 千吨 | 2026-9 |
| 1981 | 243 | 千吨 | 2026-9 |
| 1980 | 221 | 千吨 | 2026-9 |
| 1979 | 189 | 千吨 | 2026-9 |
| 1978 | 177 | 千吨 | 2026-9 |
| 1977 | 172 | 千吨 | 2026-9 |
| 1976 | 152 | 千吨 | 2026-9 |
| 1975 | 148 | 千吨 | 2026-9 |
| 1974 | 145 | 千吨 | 2026-9 |
| 1973 | 124 | 千吨 | 2026-9 |
| 1972 | 127 | 千吨 | 2026-9 |
| 1971 | 116 | 千吨 | 2026-9 |
| 1970 | 108 | 千吨 | 2026-9 |
| 1969 | 105 | 千吨 | 2026-9 |
| 1968 | 102 | 千吨 | 2026-9 |
| 1967 | 120 | 千吨 | 2026-9 |
| 1966 | 121 | 千吨 | 2026-9 |
| 1965 | 114 | 千吨 | 2026-9 |
| 1964 | 124 | 千吨 | 2026-9 |