An ABC automobile insurance company classifies each driver as a good risk, a medium risk, or a poor risk. Of those currently insured, 30% are good risks, 50% are medium risks, and 20% are poor risks. In any given year, the probability that a driver will have a traffic accident is 0.1 for a good risk, 0.3 for a medium risk, and 0.5 for a poor risk. The company announced that it will raise the insurance premiums for the drivers who either are poor risks or had a traffic accident during 2020, or both. What proportion of customers would have their premiums raised?