Still, they can only count the numbers that say Yes. You can't count Refused to Answer as you don't know why people refused. At least some of those who Refuse to Answer would be correct in actually saying Yes if they were not afraid of that information getting out. So, more than likely that the number is considerably higher than 3.8%. You can only consider 3.8% to be a minimum as there is no way to accurately factor in people who do not self-identify.
DeeAnn