An annual survey conducted by Barrington, IL firm Willard Bishop revealed that sales within traditional grocery formats increased 1% to nearly $523 billion in 2013, while sales within non-traditional formats rose 3.1% to about $442 billion.

The market share for traditional formats decreased 0.5% to 46%, while the market share for non-traditional formats increased 0.4% to 39%.

In addition, the survey found that convenience store sales accounted for 15% of sales – up from 14.9% – with stores selling gas accounting for 12.8% of the total.

E-commerce sales for food and consumables, which are included in the non-traditional grocery category, rose 13.7% to $21.1 billion, and the report projects that e-commerce sales will grow at a rate of 9.5% per year through 2018.

Food sales growth:

Fresh formats – 10.4%
Dollar stores – 8.9%
Limited-assortment stores – 4.1%
Supercenters – 4%
Super warehouses – 3.5%
Small grocery stores – 2.4%
Convenience stores – 2.4%
Wholesale clubs – 2.3%
Drug stores – 1.4%