| 序号 | 时间 (年) |
数据 (吨/公顷) |
|---|---|---|
| 1 | 2025 | |
| 2 | 2024 | |
| 3 | 2023 | |
| 4 | 2022 | |
| 5 | 2021 | |
| 6 | 2020 | |
| 7 | 2019 | 3.38 |
| 8 | 2018 | 3.69 |
| 9 | 2017 | 3.86 |
| 10 | 2016 | 2.92 |
| 11 | 1990 | 3.08 |
| 12 | 1989 | 2.95 |
| 13 | 1988 | 3.06 |
| 14 | 1987 | 3.49 |
| 15 | 1986 | 3.14 |
| 16 | 1985 | 3.02 |
| 17 | 1984 | 3.44 |
| 18 | 1983 | 2.55 |
| 19 | 1982 | 3.33 |
| 20 | 1981 | 2.60 |
| 21 | 1980 | 3.26 |
| 22 | 1979 | 2.68 |
| 23 | 1978 | 2.42 |
| 24 | 1977 | 2.58 |
| 25 | 1976 | 2.31 |
| 26 | 1975 | 1.56 |
| 27 | 1974 | 2.20 |
| 28 | 1973 | 2.21 |
| 29 | 1972 | 2.00 |
| 30 | 1971 | 2.00 |
| 31 | 1970 | 2.00 |
| 32 | 1969 | 2.20 |
| 33 | 1968 | 2.17 |
| 34 | 1967 | 1.88 |
| 35 | 1966 | 1.50 |
| 36 | 1965 | 1.50 |
| 37 | 1964 | 1.50 |
