Comment by corin_

Your definition of "common" is out of step with most people's. It means not-rare, or widespread, for example jobs in trucking, retail, and tech are all common in America without that implying any of them make up 50% of the country's jobs. Or another example, in the UK the NHS classes probability of side effects into groups where "very common" means "more than 1 in 10" and "common" means around 1 in 10+ (with the next grade being "rare" for 1 in 100+).