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 | 1.33 |
7 | 2019 | 1.67 |
8 | 2018 | 1.33 |
9 | 2017 | 1.67 |
10 | 2016 | 1.50 |
11 | 2015 | 1.50 |
12 | 2014 | 1.00 |
13 | 1999 | 2.00 |
14 | 1998 | 2.00 |
15 | 1997 | 1.67 |
16 | 1996 | 2.00 |
17 | 1995 | 2.00 |
18 | 1994 | 2.00 |
19 | 1993 | 2.17 |
20 | 1992 | 2.60 |
21 | 1991 | 2.00 |
22 | 1990 | 2.00 |
23 | 1989 | 2.00 |
24 | 1988 | 1.83 |
25 | 1987 | 1.88 |
26 | 1986 | 2.00 |
27 | 1985 | 1.67 |
28 | 1984 | 1.71 |
29 | 1983 | 1.67 |
30 | 1982 | 1.50 |
31 | 1981 | 1.50 |
32 | 1980 | 1.60 |
33 | 1979 | 1.73 |
34 | 1978 | 1.68 |
35 | 1977 | 1.71 |
36 | 1976 | 1.73 |
37 | 1975 | 1.47 |
38 | 1974 | 1.51 |
39 | 1973 | 1.52 |
40 | 1972 | 1.69 |
41 | 1971 | 1.67 |
42 | 1970 | 1.53 |
43 | 1969 | 1.51 |
44 | 1968 | 1.49 |
45 | 1967 | 1.49 |
46 | 1966 | 1.44 |
47 | 1965 | 1.24 |
48 | 1964 | 1.25 |
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