| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1996 | 18 | 千吨 | 2026-9 |
| 1995 | 16 | 千吨 | 2026-9 |
| 1994 | 14 | 千吨 | 2026-9 |
| 1993 | 15 | 千吨 | 2026-9 |
| 1992 | 20 | 千吨 | 2026-9 |
| 1991 | 34 | 千吨 | 2026-9 |
| 1990 | 20 | 千吨 | 2026-9 |
| 1989 | 9 | 千吨 | 2026-9 |
| 1988 | 60 | 千吨 | 2026-9 |
| 1987 | 302 | 千吨 | 2026-9 |
| 1986 | 477 | 千吨 | 2026-9 |
| 1985 | 505 | 千吨 | 2026-9 |
| 1984 | 437 | 千吨 | 2026-9 |
| 1983 | 304 | 千吨 | 2026-9 |
| 1982 | 122 | 千吨 | 2026-9 |
| 1981 | 89 | 千吨 | 2026-9 |
| 1980 | 177 | 千吨 | 2026-9 |
| 1979 | 235 | 千吨 | 2026-9 |
| 1978 | 201 | 千吨 | 2026-9 |
| 1977 | 138 | 千吨 | 2026-9 |
| 1976 | 122 | 千吨 | 2026-9 |
| 1975 | 45 | 千吨 | 2026-9 |
| 1974 | 56 | 千吨 | 2026-9 |
| 1973 | 111 | 千吨 | 2026-9 |
| 1972 | 134 | 千吨 | 2026-9 |
| 1971 | 50 | 千吨 | 2026-9 |
| 1970 | 89 | 千吨 | 2026-9 |
| 1969 | 112 | 千吨 | 2026-9 |
| 1968 | 98 | 千吨 | 2026-9 |
| 1967 | 67 | 千吨 | 2026-9 |
| 1966 | 49 | 千吨 | 2026-9 |
| 1965 | 41 | 千吨 | 2026-9 |
| 1964 | 35 | 千吨 | 2026-9 |