单位:千头
时间范围:1975 - 2024
数据来源:美国农业部
| 序号 | 时间(年) | 数据(千头) |
|---|---|---|
| 1 | 2024 | |
| 2 | 2023 | |
| 3 | 2022 | |
| 4 | 2021 | |
| 5 | 2020 | |
| 6 | 2019 | 9765.00 |
| 7 | 2018 | 9385.00 |
| 8 | 2017 | 9095.00 |
| 9 | 2016 | 8875.00 |
| 10 | 2015 | 8435.00 |
| 11 | 2014 | 8160.00 |
| 12 | 2013 | 7900.00 |
| 13 | 2012 | 7820.00 |
| 14 | 2011 | 7870.00 |
| 15 | 2010 | 7990.00 |
| 16 | 2009 | 8115.00 |
| 17 | 2008 | 8098.00 |
| 18 | 2007 | 8236.00 |
| 19 | 2006 | 8553.00 |
| 20 | 2005 | 8817.00 |
| 21 | 2004 | 8812.00 |
| 22 | 2003 | 8743.00 |
| 23 | 2002 | 8724.00 |
| 24 | 2001 | 8643.00 |
| 25 | 2000 | 8704.00 |
| 26 | 1999 | 8428.00 |
| 27 | 1998 | 8726.00 |
| 28 | 1997 | 8749.00 |
| 29 | 1996 | 8580.00 |
| 30 | 1995 | 8299.00 |
| 31 | 1994 | 8058.00 |
| 32 | 1993 | 7880.00 |
| 33 | 1992 | 8382.00 |
| 34 | 1991 | 8951.00 |
| 35 | 1990 | 8922.00 |
| 36 | 1989 | 8841.00 |
| 37 | 1988 | 8703.00 |
| 38 | 1987 | 8646.00 |
| 39 | 1986 | 8443.00 |
| 40 | 1985 | 8179.00 |
| 41 | 1984 | 8078.00 |
| 42 | 1983 | 7821.00 |
| 43 | 1982 | 7594.00 |
| 44 | 1981 | 7283.00 |
| 45 | 1980 | 6955.00 |
| 46 | 1979 | 7278.00 |
| 47 | 1978 | 7261.00 |
| 48 | 1977 | 7284.00 |
| 49 | 1976 | 4315.00 |
| 50 | 1975 | 4116.00 |
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