effectivetaxrateontop5pct-and-rateneededtoincreasetaxrevenuesby10pctofgdp-us-1960to2016 Published September 26, 2017 at 1534 × 958 in effectivetaxrateontop5pct-and-rateneededtoincreasetaxrevenuesby10pctofgdp-us-1960to2016