单位:千头
时间范围:1974 - 2025
数据来源:美国农业部
| 序号 | 时间(年) | 数据(千头) |
|---|---|---|
| 1 | 2025 | |
| 2 | 2024 | |
| 3 | 2023 | |
| 4 | 2022 | |
| 5 | 2021 | |
| 6 | 2020 | 343.00 |
| 7 | 2019 | 517.00 |
| 8 | 2018 | 385.00 |
| 9 | 2017 | 515.00 |
| 10 | 2016 | 476.00 |
| 11 | 2015 | 722.00 |
| 12 | 2014 | 945.00 |
| 13 | 2013 | 559.00 |
| 14 | 2012 | 525.00 |
| 15 | 2011 | 639.00 |
| 16 | 2010 | 926.00 |
| 17 | 2009 | 634.00 |
| 18 | 2008 | 615.00 |
| 19 | 2007 | 796.00 |
| 20 | 2006 | 601.00 |
| 21 | 2005 | 737.00 |
| 22 | 2004 | 688.00 |
| 23 | 2003 | 855.00 |
| 24 | 2002 | 703.00 |
| 25 | 2001 | 947.00 |
| 26 | 2000 | 800.00 |
| 27 | 1999 | 803.00 |
| 28 | 1998 | 799.00 |
| 29 | 1997 | 749.00 |
| 30 | 1996 | 825.00 |
| 31 | 1995 | 945.00 |
| 32 | 1994 | 918.00 |
| 33 | 1993 | 693.00 |
| 34 | 1992 | 1065.00 |
| 35 | 1991 | 1542.00 |
| 36 | 1990 | 2332.00 |
| 37 | 1989 | 2184.00 |
| 38 | 1988 | 1629.00 |
| 39 | 1987 | 1704.00 |
| 40 | 1986 | 1916.00 |
| 41 | 1985 | 1935.00 |
| 42 | 1984 | 2150.00 |
| 43 | 1983 | 2074.00 |
| 44 | 1982 | 1910.00 |
| 45 | 1981 | 2018.00 |
| 46 | 1980 | 1884.00 |
| 47 | 1979 | 2058.00 |
| 48 | 1978 | 1951.00 |
| 49 | 1977 | 1778.00 |
| 50 | 1976 | 2047.00 |
| 51 | 1975 | 1563.00 |
| 52 | 1974 | 1708.00 |
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