| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 113 | 千公顷 | 2026-9 |
| 1997/1998 | 120 | 千公顷 | 2026-9 |
| 1996/1997 | 95 | 千公顷 | 2026-9 |
| 1995/1996 | 81 | 千公顷 | 2026-9 |
| 1994/1995 | 110 | 千公顷 | 2026-9 |
| 1993/1994 | 124 | 千公顷 | 2026-9 |
| 1992/1993 | 142 | 千公顷 | 2026-9 |
| 1991/1992 | 115 | 千公顷 | 2026-9 |
| 1990/1991 | 110 | 千公顷 | 2026-9 |
| 1989/1990 | 108 | 千公顷 | 2026-9 |
| 1988/1989 | 78 | 千公顷 | 2026-9 |
| 1987/1988 | 65 | 千公顷 | 2026-9 |
| 1986/1987 | 78 | 千公顷 | 2026-9 |
| 1985/1986 | 80 | 千公顷 | 2026-9 |
| 1984/1985 | 102 | 千公顷 | 2026-9 |
| 1983/1984 | 99 | 千公顷 | 2026-9 |
| 1982/1983 | 103 | 千公顷 | 2026-9 |
| 1981/1982 | 121 | 千公顷 | 2026-9 |
| 1980/1981 | 126 | 千公顷 | 2026-9 |
| 1979/1980 | 138 | 千公顷 | 2026-9 |
| 1978/1979 | 158 | 千公顷 | 2026-9 |
| 1977/1978 | 153 | 千公顷 | 2026-9 |
| 1976/1977 | 123 | 千公顷 | 2026-9 |
| 1975/1976 | 123 | 千公顷 | 2026-9 |
| 1974/1975 | 110 | 千公顷 | 2026-9 |
| 1973/1974 | 114 | 千公顷 | 2026-9 |
| 1972/1973 | 126 | 千公顷 | 2026-9 |
| 1971/1972 | 99 | 千公顷 | 2026-9 |
| 1970/1971 | 107 | 千公顷 | 2026-9 |
| 1969/1970 | 116 | 千公顷 | 2026-9 |
| 1968/1969 | 93 | 千公顷 | 2026-9 |
| 1967/1968 | 87 | 千公顷 | 2026-9 |
| 1966/1967 | 83 | 千公顷 | 2026-9 |
| 1965/1966 | 59 | 千公顷 | 2026-9 |
| 1964/1965 | 52 | 千公顷 | 2026-9 |
| 1963/1964 | 36 | 千公顷 | 2026-9 |
| 1962/1963 | 20 | 千公顷 | 2026-9 |
| 1961/1962 | 16 | 千公顷 | 2026-9 |
| 1960/1961 | 25 | 千公顷 | 2026-9 |