Independent Restaurant Industry Research

I'm looking for an overview of the "Independent" Restaurant industry in the United States. This includes number of independents, number of independents by state, breakdown of independents (how many are full-service restaurants, how many are quick service or limited service restaurants), average revenue per independent location, growth trends past 5 years, growth trend forward looking 5 years, venue / category of food cuisine (i.e India, Mexican, American, Italian etc.) and major challenges facing independents restauranteurs (restaurant owners). Independent restaurants are "non-chain" restaurants and "non-franchised" restaurants. I'm looking a nicely presented industry overview with graphs, charts and cited data. Also, i'd like for you to include a section of "buying groups" within the independent restaurant space. A buying group is a group where independents join together to get discounts by leveraging purchasing power. There are a few out there and i'd like an overview of each. What are they saving their members, what are the costs to join, what % of rebates do they take etc.. All focused on independents. No chains. No franchises.