单位:吨/公顷
时间范围:1964 - 2025
数据来源:美国农业部
| 序号 | 时间(年) | 数据(吨/公顷) |
|---|---|---|
| 1 | 2025 | |
| 2 | 2024 | |
| 3 | 2023 | |
| 4 | 2022 | |
| 5 | 2021 | |
| 6 | 2020 | 1.00 |
| 7 | 2019 | 1.94 |
| 8 | 2018 | 2.11 |
| 9 | 2017 | 1.94 |
| 10 | 2016 | 2.00 |
| 11 | 2015 | 1.91 |
| 12 | 2014 | 1.88 |
| 13 | 2013 | 1.62 |
| 14 | 2012 | 1.45 |
| 15 | 2011 | 1.76 |
| 16 | 2010 | 1.92 |
| 17 | 2009 | 1.42 |
| 18 | 2008 | 1.56 |
| 19 | 2007 | 1.54 |
| 20 | 2006 | 1.22 |
| 21 | 2005 | 1.50 |
| 22 | 1981 | 0.71 |
| 23 | 1980 | 0.71 |
| 24 | 1979 | 0.77 |
| 25 | 1978 | 0.75 |
| 26 | 1977 | 0.71 |
| 27 | 1976 | 0.67 |
| 28 | 1975 | 2.00 |
| 29 | 1974 | 2.00 |
| 30 | 1973 | 2.00 |
| 31 | 1972 | 2.00 |
| 32 | 1971 | 2.00 |
| 33 | 1970 | 0.80 |
| 34 | 1969 | 2.00 |
| 35 | 1968 | 2.00 |
| 36 | 1967 | 2.00 |
| 37 | 1966 | 2.00 |
| 38 | 1965 | 2.00 |
| 39 | 1964 | 2.00 |
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