▁top ▁ 1 ▁percent ▁and ▁the ▁rest ▁of ▁the ▁population . ▁Lar ge ▁percent ages ▁of ▁individuals ▁lack ing ▁a ▁college ▁degree ▁are ▁present ▁in ▁all ▁income ▁dem ograph ics , ▁including ▁ 3 3 % ▁of ▁those ▁with ▁heading ▁households ▁with ▁six ▁figure ▁in comes . ▁From ▁ 2 0 0 0 ▁to ▁ 2 0 1 0 , ▁the ▁ 1 . 5 % ▁of ▁Americans ▁with ▁an ▁M . D ., ▁J . D ., ▁or ▁M . B . A . ▁and ▁the ▁ 1 . 5 % ▁with ▁a ▁Ph D ▁saw ▁median ▁income ▁g ains ▁of ▁approximately ▁ 5 %. ▁Among ▁those ▁with ▁a ▁college ▁or ▁master ' s ▁degree ▁( about ▁ 2 5 % ▁of ▁the ▁American ▁work force ) ▁average ▁w ages ▁dropped ▁by ▁about ▁ 7 %, ▁( though ▁this ▁was ▁less ▁than ▁the ▁decl ine ▁in ▁w ages ▁for ▁those ▁who ▁had ▁not ▁completed ▁college ). ▁Post - 2 0 0 0 ▁data ▁has ▁provided ▁" l ittle ▁evidence " ▁for ▁S B TC ' s ▁role ▁in ▁increasing ▁inequality . ▁The ▁w age ▁prem ium ▁for ▁college ▁ ▁educated ▁has ▁ris en ▁little ▁and ▁there ▁has ▁been ▁little ▁shift ▁in ▁shares ▁of ▁employ ment ▁to ▁more ▁highly ▁sk illed ▁occup ations . ▁ ▁Appro aching ▁the ▁issue ▁from ▁occup ations ▁that ▁have ▁been ▁replaced ▁or ▁down grad ed ▁since ▁the ▁late ▁ 1 9 7 0 s , ▁one ▁scholar ▁found ▁that ▁jobs ▁that ▁" require ▁some ▁thinking ▁but ▁not ▁a