| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 2.053 | 吨/公顷 | 2026-9 |
| 2025/2026 | 2.075 | 吨/公顷 | 2026-9 |
| 2024/2025 | 1.86 | 吨/公顷 | 2026-9 |
| 2023/2024 | 1.725 | 吨/公顷 | 2026-9 |
| 2022/2023 | 2.164 | 吨/公顷 | 2026-9 |
| 2021/2022 | 2.099 | 吨/公顷 | 2026-9 |
| 2020/2021 | 1.819 | 吨/公顷 | 2026-9 |
| 2019/2020 | 1.13 | 吨/公顷 | 2026-9 |
| 2018/2019 | 1.116 | 吨/公顷 | 2026-9 |
| 2017/2018 | 1.228 | 吨/公顷 | 2026-9 |
| 2016/2017 | 1.609 | 吨/公顷 | 2026-9 |
| 2015/2016 | 1.327 | 吨/公顷 | 2026-9 |
| 2014/2015 | 1.222 | 吨/公顷 | 2026-9 |
| 2013/2014 | 1.408 | 吨/公顷 | 2026-9 |
| 2012/2013 | 1.266 | 吨/公顷 | 2026-9 |
| 2011/2012 | 1.393 | 吨/公顷 | 2026-9 |
| 2010/2011 | 1.135 | 吨/公顷 | 2026-9 |
| 2009/2010 | 1.125 | 吨/公顷 | 2026-9 |
| 2008/2009 | 1.089 | 吨/公顷 | 2026-9 |
| 2007/2008 | 0.951 | 吨/公顷 | 2026-9 |
| 2006/2007 | 0.545 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.461 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.12 | 吨/公顷 | 2026-9 |
| 2003/2004 | 1.406 | 吨/公顷 | 2026-9 |
| 2002/2003 | 0.671 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1.318 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.217 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.287 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.355 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.226 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.529 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.478 | 吨/公顷 | 2026-9 |
| 1994/1995 | 0.901 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.763 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.657 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.126 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.356 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.56 | 吨/公顷 | 2026-9 |
| 1988/1989 | 1.279 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.103 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.203 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.176 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.067 | 吨/公顷 | 2026-9 |
| 1983/1984 | 0.944 | 吨/公顷 | 2026-9 |
| 1982/1983 | 0.583 | 吨/公顷 | 2026-9 |
| 1981/1982 | 0.938 | 吨/公顷 | 2026-9 |
| 1980/1981 | 0.708 | 吨/公顷 | 2026-9 |
| 1979/1980 | 0.976 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.046 | 吨/公顷 | 2026-9 |
| 1977/1978 | 0.842 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.125 | 吨/公顷 | 2026-9 |
| 1975/1976 | 0.75 | 吨/公顷 | 2026-9 |
| 1974/1975 | 0.75 | 吨/公顷 | 2026-9 |
| 1973/1974 | 0.647 | 吨/公顷 | 2026-9 |
| 1972/1973 | 0.377 | 吨/公顷 | 2026-9 |
| 1971/1972 | 0.632 | 吨/公顷 | 2026-9 |
| 1970/1971 | 0.81 | 吨/公顷 | 2026-9 |
| 1969/1970 | 1 | 吨/公顷 | 2026-9 |
| 1968/1969 | 0 | 吨/公顷 | 2026-9 |