Since 1993, ERS has calculated "normalized prices" based on 5-year lagged averages of actual market prices (e.g., an average of 2009-13 market prices is used to calculate the national normalized prices for 2015). State-level normalized prices for 2015 were calculated by multiplying the national-level normalized prices by the average ratios of the State-level market prices to the national market prices for 2011-13. National price indices are as reported by USDA/NASS QuickStats.
All data are gathered and summarized from official statistics from USDA’s National Agricultural Statistics Service QuickStats.
The next update of the normalized prices series is expected to contain estimates for 2015. These estimates should appear at the end of September 2016 as an update to this data product.