| 年度 | 数值 | 单位 | 发布日期 |
| 2025/2026 | 1.35 | 吨/公顷 | 2026-9 |
| 2024/2025 | 1.35 | 吨/公顷 | 2026-9 |
| 2023/2024 | 1.18 | 吨/公顷 | 2026-9 |
| 2022/2023 | 1.521 | 吨/公顷 | 2026-9 |
| 2021/2022 | 1.346 | 吨/公顷 | 2026-9 |
| 2020/2021 | 1.354 | 吨/公顷 | 2026-9 |
| 2019/2020 | 1.222 | 吨/公顷 | 2026-9 |
| 2018/2019 | 1.127 | 吨/公顷 | 2026-9 |
| 2017/2018 | 1.16 | 吨/公顷 | 2026-9 |
| 2016/2017 | 1.099 | 吨/公顷 | 2026-9 |
| 2015/2016 | 1.167 | 吨/公顷 | 2026-9 |
| 2014/2015 | 1.035 | 吨/公顷 | 2026-9 |
| 2013/2014 | 1.124 | 吨/公顷 | 2026-9 |
| 2012/2013 | 0.808 | 吨/公顷 | 2026-9 |
| 2011/2012 | 1.12 | 吨/公顷 | 2026-9 |
| 2010/2011 | 0.89 | 吨/公顷 | 2026-9 |
| 2009/2010 | 1.162 | 吨/公顷 | 2026-9 |
| 2008/2009 | 1.153 | 吨/公顷 | 2026-9 |
| 2007/2008 | 1.208 | 吨/公顷 | 2026-9 |
| 2006/2007 | 1.171 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.094 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.216 | 吨/公顷 | 2026-9 |
| 2003/2004 | 0.907 | 吨/公顷 | 2026-9 |
| 2002/2003 | 1.106 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1 | 吨/公顷 | 2026-9 |
| 2000/2001 | 0.976 | 吨/公顷 | 2026-9 |
| 1999/2000 | 0.986 | 吨/公顷 | 2026-9 |
| 1998/1999 | 0.799 | 吨/公顷 | 2026-9 |
| 1997/1998 | 0.748 | 吨/公顷 | 2026-9 |
| 1996/1997 | 0.719 | 吨/公顷 | 2026-9 |
| 1995/1996 | 0.783 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.032 | 吨/公顷 | 2026-9 |
| 1993/1994 | 0.993 | 吨/公顷 | 2026-9 |
| 1992/1993 | 0.918 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.039 | 吨/公顷 | 2026-9 |
| 1990/1991 | 0.846 | 吨/公顷 | 2026-9 |
| 1989/1990 | 0.781 | 吨/公顷 | 2026-9 |
| 1988/1989 | 0.943 | 吨/公顷 | 2026-9 |
| 1987/1988 | 0.865 | 吨/公顷 | 2026-9 |
| 1986/1987 | 0.787 | 吨/公顷 | 2026-9 |
| 1985/1986 | 0.882 | 吨/公顷 | 2026-9 |
| 1984/1985 | 0.665 | 吨/公顷 | 2026-9 |
| 1983/1984 | 0.625 | 吨/公顷 | 2026-9 |
| 1982/1983 | 0.542 | 吨/公顷 | 2026-9 |
| 1981/1982 | 0.49 | 吨/公顷 | 2026-9 |
| 1980/1981 | 0.538 | 吨/公顷 | 2026-9 |
| 1979/1980 | 0.688 | 吨/公顷 | 2026-9 |
| 1978/1979 | 0.864 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.06 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.01 | 吨/公顷 | 2026-9 |
| 1975/1976 | 0.959 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.216 | 吨/公顷 | 2026-9 |
| 1973/1974 | 0.925 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.015 | 吨/公顷 | 2026-9 |
| 1971/1972 | 0.875 | 吨/公顷 | 2026-9 |
| 1970/1971 | 1.066 | 吨/公顷 | 2026-9 |
| 1969/1970 | 0.926 | 吨/公顷 | 2026-9 |