Is it really necessary to check clothing for Shaatnez? In all my years of shopping (in Jewish and non-Jewish stores, US and worldwide) I have never found Shaatnez in the clothing. Should this then mean that this is a מיעוט שאינו מצוי, and as such is not to be worried about? Maybe my personal experience isn't comprehensive enough. If this is the case, is there data suggesting otherwise?