| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1999/2000 | 3 | 千吨 | 2026-9 |
| 1998/1999 | 3 | 千吨 | 2026-9 |
| 1997/1998 | 5 | 千吨 | 2026-9 |
| 1996/1997 | 2 | 千吨 | 2026-9 |
| 1995/1996 | 5 | 千吨 | 2026-9 |
| 1994/1995 | 12 | 千吨 | 2026-9 |
| 1993/1994 | 20 | 千吨 | 2026-9 |
| 1992/1993 | 28 | 千吨 | 2026-9 |
| 1991/1992 | 60 | 千吨 | 2026-9 |
| 1990/1991 | 55 | 千吨 | 2026-9 |
| 1989/1990 | 58 | 千吨 | 2026-9 |
| 1988/1989 | 61 | 千吨 | 2026-9 |
| 1987/1988 | 70 | 千吨 | 2026-9 |
| 1986/1987 | 40 | 千吨 | 2026-9 |
| 1985/1986 | 73 | 千吨 | 2026-9 |
| 1984/1985 | 67 | 千吨 | 2026-9 |
| 1983/1984 | 74 | 千吨 | 2026-9 |
| 1982/1983 | 72 | 千吨 | 2026-9 |
| 1981/1982 | 132 | 千吨 | 2026-9 |
| 1980/1981 | 180 | 千吨 | 2026-9 |
| 1979/1980 | 184 | 千吨 | 2026-9 |
| 1978/1979 | 206 | 千吨 | 2026-9 |
| 1977/1978 | 208 | 千吨 | 2026-9 |
| 1976/1977 | 192 | 千吨 | 2026-9 |
| 1975/1976 | 135 | 千吨 | 2026-9 |
| 1974/1975 | 141 | 千吨 | 2026-9 |
| 1973/1974 | 148 | 千吨 | 2026-9 |
| 1972/1973 | 133 | 千吨 | 2026-9 |
| 1971/1972 | 114 | 千吨 | 2026-9 |
| 1970/1971 | 80 | 千吨 | 2026-9 |
| 1969/1970 | 77 | 千吨 | 2026-9 |