| 年度 | 数值 | 单位 | 发布日期 |
| 1996 | 433 | 千吨 | 2026-9 |
| 1995 | 438 | 千吨 | 2026-9 |
| 1994 | 423 | 千吨 | 2026-9 |
| 1993 | 426 | 千吨 | 2026-9 |
| 1992 | 494 | 千吨 | 2026-9 |
| 1991 | 525 | 千吨 | 2026-9 |
| 1990 | 604 | 千吨 | 2026-9 |
| 1989 | 530 | 千吨 | 2026-9 |
| 1988 | 607 | 千吨 | 2026-9 |
| 1987 | 701 | 千吨 | 2026-9 |
| 1986 | 792 | 千吨 | 2026-9 |
| 1985 | 730 | 千吨 | 2026-9 |
| 1984 | 873 | 千吨 | 2026-9 |
| 1983 | 924 | 千吨 | 2026-9 |
| 1982 | 800 | 千吨 | 2026-9 |
| 1981 | 774 | 千吨 | 2026-9 |
| 1980 | 770 | 千吨 | 2026-9 |
| 1979 | 791 | 千吨 | 2026-9 |
| 1978 | 885 | 千吨 | 2026-9 |
| 1977 | 1097 | 千吨 | 2026-9 |
| 1976 | 1211 | 千吨 | 2026-9 |
| 1975 | 985 | 千吨 | 2026-9 |
| 1974 | 890 | 千吨 | 2026-9 |
| 1973 | 867 | 千吨 | 2026-9 |
| 1972 | 755 | 千吨 | 2026-9 |
| 1971 | 735 | 千吨 | 2026-9 |
| 1970 | 857 | 千吨 | 2026-9 |
| 1969 | 879 | 千吨 | 2026-9 |
| 1968 | 838 | 千吨 | 2026-9 |
| 1967 | 619 | 千吨 | 2026-9 |
| 1966 | 489 | 千吨 | 2026-9 |
| 1965 | 393 | 千吨 | 2026-9 |
| 1964 | 319 | 千吨 | 2026-9 |