Reaganomics from the standpoint of wealth and income inequality. He argues that the Reagan era tax cuts ended the post-World War II "Great Compression" of wealth held by the rich. The CBO Historical Tables indicate that federal spending during Reagan's two terms (FY 1981–88) averaged 22.4% GDP, well above the 20.6% GDP average from 1971 to 2009. In addition, the public debt rose from 26.1% GDP in 1980 to 41.0% GDP by 1988. In dollar terms, the public debt rose from $712 billion in 1980 to $2,052 billion in 1988, a three-fold increase. Krugman argued in June 2012 that Reagan's policies were consistent with Keynesian stimulus theories, pointing to the significant increase in per-capita spending under Reagan. William Niskanen noted that during the Reagan years, privately held federal debt increased from 22% to 38% of GDP, despite a long peacetime expansion. Second, the savings and loan problem led to an additional debt of about $125 billion. Third, greater enforcement of U.S. trade laws increased the share of U.S. imports subjected to trade restrictions from 12% in 1980 to 23% in 1988. Economists Raghuram Rajan and Luigi Zingales pointed out that many deregulation efforts had either taken place or had begun before Reagan (note the deregulation of airlines and trucking under Carter, and the beginning of deregulatory reform in railroads, telephones, natural gas, and banking). They stated, "The move toward markets preceded the leader [Reagan] who is seen as one of their saviors." Economists Paul Joskow and Roger Noll made a similar contention. Economist William A. Niskanen, a member of Reagan's Council of Economic Advisers wrote that deregulation had the "lowest priority" of the items on the Reagan agenda given that Reagan "failed to sustain the momentum for deregulation initiated in the 1970s" and that he "added more trade barriers than any administration since Hoover." By contrast, economist Milton Friedman has pointed to the number of pages added to the Federal Register each year as evidence of Reagan's anti-regulation presidency (the Register records the rules and regulations that federal agencies issue per year). The number of pages added to the Register each year declined sharply at the start of the Ronald Reagan presidency breaking a steady and sharp increase since 1960. The increase in the number of pages added per year resumed an upward, though less steep, trend after Reagan left office. In contrast, the number of pages being added each