Consumers will shop more during the peak holiday shopping months of November and December compared to last year, according to forecasts from ShopperTrak, an analyzer of retail foot traffic.

National retail sales, when compared to the same period last year, will rise 3.3 percent during November and December. Retail foot traffic will increase 2.8 percent.

Holiday sales and foot traffic historically account for about 20 percent of annual retail activity. The retail sales and traffic holiday forecast is a key marker of the nation’s economic health. ShopperTrak’s 3.3 percent holiday sales increase forecast follows 34 months of year-over-year U.S. retail sales growth. The expected increase of 2.8 percent in foot traffic trumps the last holiday season’s 2.2 percent traffic decrease from the previous year.