| 年度 | 数值 | 单位 | 发布日期 |
| 1996 | 54 | 千吨 | 2026-9 |
| 1995 | 90 | 千吨 | 2026-9 |
| 1994 | 80 | 千吨 | 2026-9 |
| 1993 | 90 | 千吨 | 2026-9 |
| 1992 | 130 | 千吨 | 2026-9 |
| 1991 | 170 | 千吨 | 2026-9 |
| 1990 | 206 | 千吨 | 2026-9 |
| 1989 | 54 | 千吨 | 2026-9 |
| 1988 | 98 | 千吨 | 2026-9 |
| 1987 | 171 | 千吨 | 2026-9 |
| 1986 | 204 | 千吨 | 2026-9 |
| 1985 | 223 | 千吨 | 2026-9 |
| 1984 | 261 | 千吨 | 2026-9 |
| 1983 | 266 | 千吨 | 2026-9 |
| 1982 | 248 | 千吨 | 2026-9 |
| 1981 | 263 | 千吨 | 2026-9 |
| 1980 | 274 | 千吨 | 2026-9 |
| 1979 | 298 | 千吨 | 2026-9 |
| 1978 | 296 | 千吨 | 2026-9 |
| 1977 | 264 | 千吨 | 2026-9 |
| 1976 | 315 | 千吨 | 2026-9 |
| 1975 | 176 | 千吨 | 2026-9 |
| 1974 | 237 | 千吨 | 2026-9 |
| 1973 | 241 | 千吨 | 2026-9 |
| 1972 | 245 | 千吨 | 2026-9 |
| 1971 | 170 | 千吨 | 2026-9 |
| 1970 | 256 | 千吨 | 2026-9 |
| 1969 | 203 | 千吨 | 2026-9 |
| 1968 | 226 | 千吨 | 2026-9 |
| 1967 | 223 | 千吨 | 2026-9 |
| 1966 | 210 | 千吨 | 2026-9 |
| 1965 | 208 | 千吨 | 2026-9 |
| 1964 | 149 | 千吨 | 2026-9 |