| 年度 | 数值 | 单位 | 发布日期 |
|---|---|---|---|
| 1987 | 20 | 千吨 | 2026-9 |
| 1986 | 16 | 千吨 | 2026-9 |
| 1985 | 17 | 千吨 | 2026-9 |
| 1984 | 17 | 千吨 | 2026-9 |
| 1983 | 17 | 千吨 | 2026-9 |
| 1982 | 15 | 千吨 | 2026-9 |
| 1981 | 13 | 千吨 | 2026-9 |
| 1980 | 18 | 千吨 | 2026-9 |
| 1979 | 18 | 千吨 | 2026-9 |
| 1978 | 18 | 千吨 | 2026-9 |
| 1977 | 18 | 千吨 | 2026-9 |
| 1976 | 17 | 千吨 | 2026-9 |
| 1975 | 20 | 千吨 | 2026-9 |
| 1974 | 18 | 千吨 | 2026-9 |
| 1973 | 18 | 千吨 | 2026-9 |
| 1972 | 16 | 千吨 | 2026-9 |
| 1971 | 24 | 千吨 | 2026-9 |
| 1970 | 73 | 千吨 | 2026-9 |
| 1969 | 74 | 千吨 | 2026-9 |
| 1968 | 76 | 千吨 | 2026-9 |
| 1967 | 63 | 千吨 | 2026-9 |
| 1966 | 54 | 千吨 | 2026-9 |
| 1965 | 43 | 千吨 | 2026-9 |
| 1964 | 25 | 千吨 | 2026-9 |