CHICAGO — Bakery cafe/bagel outlets were the most prevalent type of fast-casual chain among the top 100 chains during 2009, accounting for 21% of the total, up from 17% in 2008, according to Technomic’s 100 Fast-Casual Chain Restaurant Report. Mexican and other sandwich (not hamburger) were the second and third most common menu categories. Bakery cafe/bagel also topped the list with $4.8 billion in U.S. sales during 2009, followed by Mexican and chicken at $3.8 billion and $2.5 billion, respectively. Technomic defines fast-casual restaurants as those that are part of the limited-service segment, providing fast service and fresh, high quality food in upscale settings.