• Pig inventory on farms, Census of Agriculture, 2021
• Hogs statistics, sows farrowed, pigs born and sows bred to farrow, semi-annual
• Hogs statistics, sows farrowed, pigs born and sows bred to farrow
• Estimated sows farrowed and pigs saved, spring and fall periods
• Hogs and pigs statistics, inventory number by class and quarter, United States