| 年度 | 数值 | 单位 | 发布日期 |
| 2026/2027 | 1.995 | 吨/公顷 | 2026-9 |
| 2025/2026 | 1.867 | 吨/公顷 | 2026-9 |
| 2024/2025 | 1.809 | 吨/公顷 | 2026-9 |
| 2023/2024 | 2.145 | 吨/公顷 | 2026-9 |
| 2022/2023 | 1.89 | 吨/公顷 | 2026-9 |
| 2021/2022 | 2.362 | 吨/公顷 | 2026-9 |
| 2020/2021 | 2.003 | 吨/公顷 | 2026-9 |
| 2019/2020 | 2.191 | 吨/公顷 | 2026-9 |
| 2018/2019 | 2.366 | 吨/公顷 | 2026-9 |
| 2017/2018 | 2.305 | 吨/公顷 | 2026-9 |
| 2016/2017 | 2.095 | 吨/公顷 | 2026-9 |
| 2015/2016 | 1.851 | 吨/公顷 | 2026-9 |
| 2014/2015 | 2.091 | 吨/公顷 | 2026-9 |
| 2013/2014 | 1.961 | 吨/公顷 | 2026-9 |
| 2012/2013 | 1.652 | 吨/公顷 | 2026-9 |
| 2011/2012 | 1.974 | 吨/公顷 | 2026-9 |
| 2010/2011 | 1.857 | 吨/公顷 | 2026-9 |
| 2009/2010 | 1.782 | 吨/公顷 | 2026-9 |
| 2008/2009 | 1.912 | 吨/公顷 | 2026-9 |
| 2007/2008 | 1.45 | 吨/公顷 | 2026-9 |
| 2006/2007 | 1.641 | 吨/公顷 | 2026-9 |
| 2005/2006 | 1.668 | 吨/公顷 | 2026-9 |
| 2004/2005 | 1.774 | 吨/公顷 | 2026-9 |
| 2003/2004 | 1.489 | 吨/公顷 | 2026-9 |
| 2002/2003 | 1.511 | 吨/公顷 | 2026-9 |
| 2001/2002 | 1.403 | 吨/公顷 | 2026-9 |
| 2000/2001 | 1.443 | 吨/公顷 | 2026-9 |
| 1999/2000 | 1.427 | 吨/公顷 | 2026-9 |