This gives a view of the frequency of the DRD4 promotor. One surprise is that Russians have a frequency more like the indigenous peoples of the Americas. Maybe the Siberia origin of that allele is showing through?
But the specific DRD4 7R allele is estimated to be only about 10% in Asia (though there is a similar allele, 2R that is fairly high frequency there with what is thought to have similar phenotype). And the frequency estimate for Europeans for DRD4 7R is around 15-20% and for indigenous peoples of the Americans 70-80%.