During the period 1951-63, when marginal rates were at their peak—91 percent or 92 percent—the American economy boomed, growing at an average annual rate of 3.71 percent. The fact that the marginal rates were what would today be viewed as essentially confiscatory did not cause economic cataclysm—just the opposite. And during the past seven years, during which we reduced the top marginal rate to 35 percent, average growth was a more meager 1.71 percent.