单位:千头
时间范围:1979 - 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 | 1174.00 |
| 7 | 2019 | 1219.00 |
| 8 | 2018 | 1199.00 |
| 9 | 2017 | 1160.00 |
| 10 | 2016 | 1165.00 |
| 11 | 2015 | 1120.00 |
| 12 | 2014 | 1116.00 |
| 13 | 2013 | 1130.00 |
| 14 | 2012 | 1200.00 |
| 15 | 2011 | 1200.00 |
| 16 | 2010 | 1150.00 |
| 17 | 2009 | 1149.00 |
| 18 | 2008 | 1200.00 |
| 19 | 2007 | 1617.00 |
| 20 | 2006 | 1580.00 |
| 21 | 2005 | 1256.00 |
| 22 | 2004 | 1200.00 |
| 23 | 2003 | 1800.00 |
| 24 | 2002 | 2050.00 |
| 25 | 2001 | 2165.00 |
| 26 | 2000 | 3580.00 |
| 27 | 1999 | 4501.00 |
| 28 | 1998 | 6556.00 |
| 29 | 1997 | 6371.00 |
| 30 | 1996 | 6542.00 |
| 31 | 1995 | 7315.00 |
| 32 | 1994 | 7100.00 |
| 33 | 1993 | 7720.00 |
| 34 | 1992 | 9660.00 |
| 35 | 1991 | 7280.00 |
| 36 | 1990 | 7840.00 |
| 37 | 1989 | 9230.00 |
| 38 | 1988 | 7331.00 |
| 39 | 1987 | 7683.00 |
| 40 | 1986 | 7109.00 |
| 41 | 1985 | 7333.00 |
| 42 | 1984 | 7790.00 |
| 43 | 1983 | 7638.00 |
| 44 | 1982 | 6560.00 |
| 45 | 1981 | 6710.00 |
| 46 | 1980 | 17500.00 |
| 47 | 1979 | 18250.00 |
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