Iran's retail industry consists largely of cooperatives (many of them government-sponsored), and independent retailers operating in bazaars. The bulk of food sales occur at street markets with prices set by the Chief Statistics Bureau. Iran has 438,478 small grocery retailers. These are especially popular in cities other than Tehran where the number of hypermarkets and supermarkets is still very limited. More mini-markets and supermarkets are emerging, mostly independent operations. The biggest chainstores are state-owned Etka, Refah, Shahrvand and Hyperstar Market. Electronic commerce in Iran passed the $1 billion mark in 2009.