Background of Pork Production in U.S.
![Food Guide Pyramid](https://webarchive.library.unt.edu/eot2008/20090512141503im_/http://www.epa.gov/agriculture/images/pyramid.gif)
Source: U.S. Dept. of Agriculture/Dept. of Health and Human Services
There has also been a significant change in how and where hogs are produced
in the U.S. over the past 50 years. Low consumer prices, and therefore
low producer prices, have resulted in larger, more efficient operations,
with many smaller farms no longer able to produce pigs profitably.
![Number of Hog Operations, USA](https://webarchive.library.unt.edu/eot2008/20090512141503im_/http://www.epa.gov/agriculture/images/hogfarms1.gif)
Source: USDA - NASS
![U.S. Hog Operations Percent of Operations and Inventory, 2000](https://webarchive.library.unt.edu/eot2008/20090512141503im_/http://www.epa.gov/agriculture/images/hoginvent1.gif)
Source: USDA - NASS
![Cattle, Broilers, Hogs, Turkeys Value of Production, 1945-1999](https://webarchive.library.unt.edu/eot2008/20090512141503im_/http://www.epa.gov/agriculture/images/valprd1.gif)
Source: USDA - NASS
In 1997, sales of all animals in the U.S. totaled over $75 billion. Currently, most of the swine in the United States are produced in North Carolina and the Midwestern and plains states, including Nebraska, Iowa, Minnesota, Missouri, Indiana and Illinois. Worldwide, China is by far the largest producer of pork, producing nearly four times as much as the U.S.
There are many breeds of swine, such as Hampshire, Duroc, Poland, China,
Landrace, etc., but most farms use crossbreeds to try to gain the best
traits of each breed.