 In 2008, the Consumer Federation of America estimated that Proposition 103 had saved consumers over $62 billion since 1988.During 2010, Consumer Watchdog opposed Proposition 17, a ballot measure sponsored by Mercury Insurance Group to repeal a provision of Proposition 103 which prohibits insurance companies from considering a driver's history of prior insurance coverage when determining the price or availability of automobile insurance.Mercury spent $16 million in its effort, funding a group called Californians for Fair Automobile Insurance Rates.