| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 2.146 | 吨/公顷 | 2026-9 |
| 2025/2026 | 2.133 | 吨/公顷 | 2026-9 |
| 2024/2025 | 2.135 | 吨/公顷 | 2026-9 |
| 2023/2024 | 2.135 | 吨/公顷 | 2026-9 |
| 2022/2023 | 2.095 | 吨/公顷 | 2026-9 |
| 2021/2022 | 2.141 | 吨/公顷 | 2026-9 |
| 2020/2021 | 2.104 | 吨/公顷 | 2026-9 |
| 2019/2020 | 2.077 | 吨/公顷 | 2026-9 |
| 2018/2019 | 2.049 | 吨/公顷 | 2026-9 |
| 2017/2018 | 2.027 | 吨/公顷 | 2026-9 |
| 2016/2017 | 1.995 | 吨/公顷 | 2026-9 |
| 2015/2016 | 1.982 | 吨/公顷 | 2026-9 |
| 2014/2015 | 1.972 | 吨/公顷 | 2026-9 |
| 2013/2014 | 1.944 | 吨/公顷 | 2026-9 |
| 2012/2013 | 1.88 | 吨/公顷 | 2026-9 |
| 2011/2012 | 1.865 | 吨/公顷 | 2026-9 |
| 2010/2011 | 1.827 | 吨/公顷 | 2026-9 |
| 2009/2010 | 1.888 | 吨/公顷 | 2026-9 |
| 2008/2009 | 1.814 | 吨/公顷 | 2026-9 |
| 2007/2008 | 1.854 | 吨/公顷 | 2026-9 |
| 2006/2007 | 1.833 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.793 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.813 | 吨/公顷 | 2026-9 |
| 2003/2004 | 1.582 | 吨/公顷 | 2026-9 |
| 2002/2003 | 1.477 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1.597 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.519 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.469 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.272 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.479 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.366 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.416 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.296 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.309 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.281 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.213 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.264 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.089 | 吨/公顷 | 2026-9 |
| 1988/1989 | 1.022 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.254 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.196 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.248 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.232 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.168 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.372 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.07 | 吨/公顷 | 2026-9 |
| 1980/1981 | 0.838 | 吨/公顷 | 2026-9 |
| 1979/1980 | 0.87 | 吨/公顷 | 2026-9 |
| 1978/1979 | 0.719 | 吨/公顷 | 2026-9 |
| 1977/1978 | 0.532 | 吨/公顷 | 2026-9 |
| 1976/1977 | 0.575 | 吨/公顷 | 2026-9 |
| 1975/1976 | 0.664 | 吨/公顷 | 2026-9 |
| 1974/1975 | 0.67 | 吨/公顷 | 2026-9 |
| 1973/1974 | 0.646 | 吨/公顷 | 2026-9 |
| 1972/1973 | 0.71 | 吨/公顷 | 2026-9 |
| 1971/1972 | 0.763 | 吨/公顷 | 2026-9 |
| 1970/1971 | 0.664 | 吨/公顷 | 2026-9 |
| 1969/1970 | 0.615 | 吨/公顷 | 2026-9 |
| 1968/1969 | 0.644 | 吨/公顷 | 2026-9 |
| 1967/1968 | 0.609 | 吨/公顷 | 2026-9 |
| 1966/1967 | 0.518 | 吨/公顷 | 2026-9 |
| 1965/1966 | 0.598 | 吨/公顷 | 2026-9 |
| 1964/1965 | 0.525 | 吨/公顷 | 2026-9 |