These "power" categories have the biggest sales growth in SN's product guide this year. IRI provided this sales data for these categories for the 52 weeks ending June 16, 2013.
Data Table: Supermarket Categories by Dollar, Unit Sales 
SN's Category Guide (With data from IRI and Nielsen Perishables Group)
Healthy Growth in Some Nonfood Categories 
Center Store Categories Are Power Packed 
Fresh Market Categories on Solid Ground