These critics assert that these rate increases are causing doctors to go out of business or move to states with more favorable tort systems. Not everyone agrees, though, that medical malpractice lawsuits are solely causing these rate increases. A 2003 report from the General Accounting Office found multiple reasons for these rate increases, with medical malpractice lawsuits being the primary driver. Despite noting multiple reasons for rate increases, the report goes on to state that the "GAO found that losses on medical malpractice claims-which make up the largest part of insurers’ costs-appear to be the primary driver of rate increases in the long run." More recent data has indicated that medical malpractice rates are generally no longer rising. In 2011, data pooled from the industry by the publication Medical Liability Monitor indicated that medical malpractice insurance rates had declined for four straight years. The decrease was seen in both states that had enacted tort reform and in states that had not, leading actuaries familiar with the data to suggest that patient safety and risk management campaigns had had a more significant effect.