| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 3.097 | 吨/公顷 | 2026-9 |
| 2025/2026 | 3.014 | 吨/公顷 | 2026-9 |
| 2024/2025 | 2.917 | 吨/公顷 | 2026-9 |
| 2023/2024 | 2.833 | 吨/公顷 | 2026-9 |
| 2022/2023 | 2.795 | 吨/公顷 | 2026-9 |
| 2021/2022 | 3.06 | 吨/公顷 | 2026-9 |
| 2020/2021 | 2.944 | 吨/公顷 | 2026-9 |
| 2019/2020 | 2.912 | 吨/公顷 | 2026-9 |
| 2018/2019 | 2.708 | 吨/公顷 | 2026-9 |
| 2017/2018 | 2.689 | 吨/公顷 | 2026-9 |
| 2016/2017 | 2.503 | 吨/公顷 | 2026-9 |
| 2015/2016 | 2.645 | 吨/公顷 | 2026-9 |
| 2014/2015 | 2.701 | 吨/公顷 | 2026-9 |
| 2013/2014 | 2.644 | 吨/公顷 | 2026-9 |
| 2012/2013 | 2.573 | 吨/公顷 | 2026-9 |
| 2011/2012 | 2.5 | 吨/公顷 | 2026-9 |
| 2010/2011 | 2.381 | 吨/公顷 | 2026-9 |
| 2009/2010 | 2.058 | 吨/公顷 | 2026-9 |
| 2008/2009 | 2.067 | 吨/公顷 | 2026-9 |
| 2007/2008 | 1.791 | 吨/公顷 | 2026-9 |
| 2006/2007 | 1.843 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.89 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.66 | 吨/公顷 | 2026-9 |
| 2003/2004 | 1.487 | 吨/公顷 | 2026-9 |
| 2002/2003 | 1.721 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1.455 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.59 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.561 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.646 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.643 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.92 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.562 | 吨/公顷 | 2026-9 |
| 1994/1995 | 1.702 | 吨/公顷 | 2026-9 |
| 1993/1994 | 1.773 | 吨/公顷 | 2026-9 |
| 1992/1993 | 1.824 | 吨/公顷 | 2026-9 |
| 1991/1992 | 1.8 | 吨/公顷 | 2026-9 |
| 1990/1991 | 1.878 | 吨/公顷 | 2026-9 |
| 1989/1990 | 1.486 | 吨/公顷 | 2026-9 |
| 1988/1989 | 1.422 | 吨/公顷 | 2026-9 |
| 1987/1988 | 1.399 | 吨/公顷 | 2026-9 |
| 1986/1987 | 1.395 | 吨/公顷 | 2026-9 |
| 1985/1986 | 1.175 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.682 | 吨/公顷 | 2026-9 |
| 1983/1984 | 1.828 | 吨/公顷 | 2026-9 |
| 1982/1983 | 1.58 | 吨/公顷 | 2026-9 |
| 1981/1982 | 1.281 | 吨/公顷 | 2026-9 |
| 1980/1981 | 1.05 | 吨/公顷 | 2026-9 |
| 1979/1980 | 0.926 | 吨/公顷 | 2026-9 |
| 1978/1979 | 0.872 | 吨/公顷 | 2026-9 |
| 1977/1978 | 0.8 | 吨/公顷 | 2026-9 |
| 1976/1977 | 0.75 | 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 | 0.75 | 吨/公顷 | 2026-9 |
| 1972/1973 | 0.75 | 吨/公顷 | 2026-9 |