A Mysterious EWG Note

From the cotton page:

Crop totals are an estimate. In the data received by EWG for 2009, USDA does not differentiate Direct Payments or Counter-Cyclical Payments by crop as in previous years. EWG allocated the region's Direct Payments by crop for the 2009 calendar year using the proportion of that crop's Direct Payments in 2008. Number of recipients receiving Direct Payments for that crop were not estimated. Due to the way Counter Cyclical Payments are made - EWG was not able to allocate Counter Cyclical Payments to crops. Also included in the crop totals are the crop insurance premiums as reported by the USDA Risk Management Agency for that crop. The crop insurance premium is the amount of money that is calculated by USDA to make the program actuarially sound. Crop insurance premium subsidies are available at the county, state and national level.

 I don't know why the data in 2009 would differ in its coding from that in previous years.