| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1996 | 20 | 千吨 | 2026-9 |
| 1995 | 18 | 千吨 | 2026-9 |
| 1994 | 21 | 千吨 | 2026-9 |
| 1993 | 37 | 千吨 | 2026-9 |
| 1992 | 20 | 千吨 | 2026-9 |
| 1991 | 48 | 千吨 | 2026-9 |
| 1990 | 75 | 千吨 | 2026-9 |
| 1989 | 22 | 千吨 | 2026-9 |
| 1988 | 43 | 千吨 | 2026-9 |
| 1987 | 218 | 千吨 | 2026-9 |
| 1986 | 320 | 千吨 | 2026-9 |
| 1985 | 242 | 千吨 | 2026-9 |
| 1984 | 226 | 千吨 | 2026-9 |
| 1983 | 198 | 千吨 | 2026-9 |
| 1982 | 99 | 千吨 | 2026-9 |
| 1981 | 42 | 千吨 | 2026-9 |
| 1980 | 33 | 千吨 | 2026-9 |
| 1979 | 56 | 千吨 | 2026-9 |
| 1978 | 68 | 千吨 | 2026-9 |
| 1977 | 35 | 千吨 | 2026-9 |
| 1976 | 27 | 千吨 | 2026-9 |
| 1975 | 31 | 千吨 | 2026-9 |
| 1974 | 15 | 千吨 | 2026-9 |
| 1973 | 18 | 千吨 | 2026-9 |
| 1972 | 46 | 千吨 | 2026-9 |
| 1971 | 14 | 千吨 | 2026-9 |
| 1970 | 18 | 千吨 | 2026-9 |
| 1969 | 67 | 千吨 | 2026-9 |
| 1968 | 44 | 千吨 | 2026-9 |
| 1967 | 19 | 千吨 | 2026-9 |
| 1966 | 19 | 千吨 | 2026-9 |
| 1965 | 22 | 千吨 | 2026-9 |
| 1964 | 10 | 千吨 | 2026-9 |