| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998 | 220 | 千吨 | 2026-9 |
| 1997 | 284 | 千吨 | 2026-9 |
| 1996 | 187 | 千吨 | 2026-9 |
| 1995 | 105 | 千吨 | 2026-9 |
| 1994 | 27 | 千吨 | 2026-9 |
| 1993 | 11 | 千吨 | 2026-9 |
| 1992 | 14 | 千吨 | 2026-9 |
| 1991 | 21 | 千吨 | 2026-9 |
| 1990 | 50 | 千吨 | 2026-9 |
| 1989 | 73 | 千吨 | 2026-9 |
| 1988 | 76 | 千吨 | 2026-9 |
| 1987 | 75 | 千吨 | 2026-9 |
| 1986 | 73 | 千吨 | 2026-9 |
| 1985 | 67 | 千吨 | 2026-9 |
| 1984 | 58 | 千吨 | 2026-9 |
| 1983 | 79 | 千吨 | 2026-9 |
| 1982 | 40 | 千吨 | 2026-9 |
| 1981 | 48 | 千吨 | 2026-9 |
| 1980 | 98 | 千吨 | 2026-9 |
| 1979 | 110 | 千吨 | 2026-9 |
| 1978 | 89 | 千吨 | 2026-9 |
| 1977 | 83 | 千吨 | 2026-9 |
| 1976 | 89 | 千吨 | 2026-9 |
| 1975 | 81 | 千吨 | 2026-9 |
| 1974 | 91 | 千吨 | 2026-9 |
| 1973 | 160 | 千吨 | 2026-9 |
| 1972 | 148 | 千吨 | 2026-9 |
| 1971 | 147 | 千吨 | 2026-9 |
| 1970 | 136 | 千吨 | 2026-9 |
| 1969 | 141 | 千吨 | 2026-9 |
| 1968 | 151 | 千吨 | 2026-9 |
| 1967 | 157 | 千吨 | 2026-9 |
| 1966 | 148 | 千吨 | 2026-9 |
| 1965 | 182 | 千吨 | 2026-9 |
| 1964 | 139 | 千吨 | 2026-9 |
| 1963 | 141 | 千吨 | 2026-9 |
| 1962 | 154 | 千吨 | 2026-9 |
| 1961 | 155 | 千吨 | 2026-9 |
| 1960 | 0 | 千吨 | 2026-9 |