| 年度 | 数值 | 单位 | 发布日期 |
|---|
| 1998/1999 | 62 | 千公顷 | 2026-9 |
| 1997/1998 | 70 | 千公顷 | 2026-9 |
| 1996/1997 | 70 | 千公顷 | 2026-9 |
| 1995/1996 | 80 | 千公顷 | 2026-9 |
| 1994/1995 | 90 | 千公顷 | 2026-9 |
| 1993/1994 | 70 | 千公顷 | 2026-9 |
| 1992/1993 | 70 | 千公顷 | 2026-9 |
| 1991/1992 | 93 | 千公顷 | 2026-9 |
| 1990/1991 | 92 | 千公顷 | 2026-9 |
| 1989/1990 | 97 | 千公顷 | 2026-9 |
| 1988/1989 | 97 | 千公顷 | 2026-9 |
| 1987/1988 | 94 | 千公顷 | 2026-9 |
| 1986/1987 | 89 | 千公顷 | 2026-9 |
| 1985/1986 | 85 | 千公顷 | 2026-9 |
| 1984/1985 | 75 | 千公顷 | 2026-9 |
| 1983/1984 | 72 | 千公顷 | 2026-9 |
| 1982/1983 | 74 | 千公顷 | 2026-9 |
| 1981/1982 | 74 | 千公顷 | 2026-9 |
| 1980/1981 | 73 | 千公顷 | 2026-9 |
| 1979/1980 | 69 | 千公顷 | 2026-9 |
| 1978/1979 | 78 | 千公顷 | 2026-9 |
| 1977/1978 | 91 | 千公顷 | 2026-9 |
| 1976/1977 | 93 | 千公顷 | 2026-9 |
| 1975/1976 | 104 | 千公顷 | 2026-9 |
| 1974/1975 | 106 | 千公顷 | 2026-9 |
| 1973/1974 | 107 | 千公顷 | 2026-9 |
| 1972/1973 | 119 | 千公顷 | 2026-9 |
| 1971/1972 | 127 | 千公顷 | 2026-9 |
| 1970/1971 | 149 | 千公顷 | 2026-9 |
| 1969/1970 | 183 | 千公顷 | 2026-9 |
| 1968/1969 | 190 | 千公顷 | 2026-9 |
| 1967/1968 | 204 | 千公顷 | 2026-9 |
| 1966/1967 | 220 | 千公顷 | 2026-9 |
| 1965/1966 | 246 | 千公顷 | 2026-9 |
| 1964/1965 | 247 | 千公顷 | 2026-9 |
| 1963/1964 | 208 | 千公顷 | 2026-9 |
| 1962/1963 | 232 | 千公顷 | 2026-9 |
| 1961/1962 | 268 | 千公顷 | 2026-9 |
| 1960/1961 | 301 | 千公顷 | 2026-9 |