In Canada, the most important categories in the CPI basket are Shelter (30 percent of the total weight) and Transportation (17 percent). Food accounts for 16 percent; Household Operations, Furnishings and Equipment for 15 percent; Recreation, Education and Reading for 9 percent; Health and Personal Care for 5 percent; Alcoholic Beverages and Tobacco Products for 5 percent and Clothing and Footwear for the remaining 4 percent. The CPI basket is reviewed every four years on the basis of household surveys. The current weights are based on spending patterns in 2002.