| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 2.083 | 吨/公顷 | 2026-9 |
| 1997/1998 | 2.308 | 吨/公顷 | 2026-9 |
| 1996/1997 | 2.333 | 吨/公顷 | 2026-9 |
| 1995/1996 | 2 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.917 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.563 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.393 | 吨/公顷 | 2026-9 |
| 1991/1992 | 2.32 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.333 | 吨/公顷 | 2026-9 |
| 1989/1990 | 2.148 | 吨/公顷 | 2026-9 |
| 1988/1989 | 1.576 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.806 | 吨/公顷 | 2026-9 |
| 1986/1987 | 2.217 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.917 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.667 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.733 | 吨/公顷 | 2026-9 |
| 1982/1983 | 2.25 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.792 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.85 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.75 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.421 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.414 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.077 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.52 | 吨/公顷 | 2026-9 |
| 1974/1975 | 2 | 吨/公顷 | 2026-9 |
| 1973/1974 | 0 | 吨/公顷 | 2026-9 |
| 1970/1971 | 0 | 吨/公顷 | 2026-9 |
| 1969/1970 | 0 | 吨/公顷 | 2026-9 |
| 1968/1969 | 0 | 吨/公顷 | 2026-9 |
| 1967/1968 | 0 | 吨/公顷 | 2026-9 |
| 1966/1967 | 0 | 吨/公顷 | 2026-9 |
| 1965/1966 | 0 | 吨/公顷 | 2026-9 |
| 1964/1965 | 0 | 吨/公顷 | 2026-9 |