| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 1.619 | 吨/公顷 | 2026-9 |
| 2025/2026 | 1.63 | 吨/公顷 | 2026-9 |
| 2024/2025 | 1.628 | 吨/公顷 | 2026-9 |
| 2023/2024 | 1.589 | 吨/公顷 | 2026-9 |
| 2022/2023 | 1.549 | 吨/公顷 | 2026-9 |
| 2021/2022 | 1.509 | 吨/公顷 | 2026-9 |
| 2020/2021 | 1.478 | 吨/公顷 | 2026-9 |
| 2019/2020 | 1.554 | 吨/公顷 | 2026-9 |
| 2018/2019 | 1.531 | 吨/公顷 | 2026-9 |
| 2017/2018 | 1.59 | 吨/公顷 | 2026-9 |
| 2016/2017 | 1.598 | 吨/公顷 | 2026-9 |
| 2015/2016 | 1.583 | 吨/公顷 | 2026-9 |
| 2014/2015 | 1.574 | 吨/公顷 | 2026-9 |
| 2013/2014 | 1.568 | 吨/公顷 | 2026-9 |
| 2012/2013 | 1.554 | 吨/公顷 | 2026-9 |
| 2011/2012 | 1.562 | 吨/公顷 | 2026-9 |
| 2010/2011 | 1.549 | 吨/公顷 | 2026-9 |
| 2009/2010 | 1.521 | 吨/公顷 | 2026-9 |
| 2008/2009 | 1.475 | 吨/公顷 | 2026-9 |
| 2007/2008 | 1.439 | 吨/公顷 | 2026-9 |
| 2006/2007 | 1.401 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.361 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.321 | 吨/公顷 | 2026-9 |
| 2003/2004 | 1.283 | 吨/公顷 | 2026-9 |
| 2002/2003 | 1.168 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1.229 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.132 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.147 | 吨/公顷 | 2026-9 |
| 1998/1999 | 1.211 | 吨/公顷 | 2026-9 |
| 1997/1998 | 1.17 | 吨/公顷 | 2026-9 |
| 1996/1997 | 1.147 | 吨/公顷 | 2026-9 |
| 1995/1996 | 1.008 | 吨/公顷 | 2026-9 |
| 1994/1995 | 0.903 | 吨/公顷 | 2026-9 |
| 1993/1994 | 0.835 | 吨/公顷 | 2026-9 |
| 1992/1993 | 0.877 | 吨/公顷 | 2026-9 |
| 1991/1992 | 0.741 | 吨/公顷 | 2026-9 |
| 1990/1991 | 0.852 | 吨/公顷 | 2026-9 |
| 1989/1990 | 0.878 | 吨/公顷 | 2026-9 |
| 1988/1989 | 0.826 | 吨/公顷 | 2026-9 |
| 1987/1988 | 0.967 | 吨/公顷 | 2026-9 |
| 1986/1987 | 0.965 | 吨/公顷 | 2026-9 |
| 1985/1986 | 0.941 | 吨/公顷 | 2026-9 |
| 1984/1985 | 1.031 | 吨/公顷 | 2026-9 |
| 1983/1984 | 0.948 | 吨/公顷 | 2026-9 |
| 1982/1983 | 0.948 | 吨/公顷 | 2026-9 |
| 1981/1982 | 0.943 | 吨/公顷 | 2026-9 |
| 1980/1981 | 0.839 | 吨/公顷 | 2026-9 |
| 1979/1980 | 0.693 | 吨/公顷 | 2026-9 |
| 1978/1979 | 0.688 | 吨/公顷 | 2026-9 |
| 1977/1978 | 0.763 | 吨/公顷 | 2026-9 |
| 1976/1977 | 0.682 | 吨/公顷 | 2026-9 |
| 1975/1976 | 0.589 | 吨/公顷 | 2026-9 |
| 1974/1975 | 0.681 | 吨/公顷 | 2026-9 |
| 1973/1974 | 0.611 | 吨/公顷 | 2026-9 |
| 1972/1973 | 0.616 | 吨/公顷 | 2026-9 |