| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 1.992 | 吨/公顷 | 2026-9 |
| 2025/2026 | 2.089 | 吨/公顷 | 2026-9 |
| 2024/2025 | 1.87 | 吨/公顷 | 2026-9 |
| 2023/2024 | 2.004 | 吨/公顷 | 2026-9 |
| 2022/2023 | 1.969 | 吨/公顷 | 2026-9 |
| 2021/2022 | 1.714 | 吨/公顷 | 2026-9 |
| 2020/2021 | 2.007 | 吨/公顷 | 2026-9 |
| 2019/2020 | 1.747 | 吨/公顷 | 2026-9 |
| 2018/2019 | 1.941 | 吨/公顷 | 2026-9 |
| 2017/2018 | 1.796 | 吨/公顷 | 2026-9 |
| 2016/2017 | 1.94 | 吨/公顷 | 2026-9 |
| 2015/2016 | 1.82 | 吨/公顷 | 2026-9 |
| 2014/2015 | 1.649 | 吨/公顷 | 2026-9 |
| 2013/2014 | 1.546 | 吨/公顷 | 2026-9 |
| 2012/2013 | 1.666 | 吨/公顷 | 2026-9 |
| 2011/2012 | 1.568 | 吨/公顷 | 2026-9 |
| 2010/2011 | 1.637 | 吨/公顷 | 2026-9 |
| 2009/2010 | 1.741 | 吨/公顷 | 2026-9 |
| 2008/2009 | 1.601 | 吨/公顷 | 2026-9 |
| 2007/2008 | 1.598 | 吨/公顷 | 2026-9 |
| 2006/2007 | 1.358 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.725 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.344 | 吨/公顷 | 2026-9 |
| 2003/2004 | 1.36 | 吨/公顷 | 2026-9 |
| 2002/2003 | 1.268 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1.5 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.501 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.414 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.693 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.476 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.609 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.335 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.58 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.16 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.406 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.515 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.377 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.104 | 吨/公顷 | 2026-9 |
| 1988/1989 | 1.046 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.648 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.535 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.242 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.137 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.17 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.265 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.32 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.139 | 吨/公顷 | 2026-9 |
| 1979/1980 | 1.512 | 吨/公顷 | 2026-9 |
| 1978/1979 | 1.53 | 吨/公顷 | 2026-9 |
| 1977/1978 | 1.387 | 吨/公顷 | 2026-9 |
| 1976/1977 | 1.089 | 吨/公顷 | 2026-9 |
| 1975/1976 | 1.125 | 吨/公顷 | 2026-9 |
| 1974/1975 | 1.034 | 吨/公顷 | 2026-9 |
| 1973/1974 | 1.173 | 吨/公顷 | 2026-9 |
| 1972/1973 | 1.015 | 吨/公顷 | 2026-9 |