该数字（2.2%）达到了历史最高点：因为这种侵权案件的花费占美国GDP的比例在接下来的5年中持续下降，这在某种程度上是由《2005年集团诉讼公平法》的种种限制所致。

That marked a peak: the share of American GDP represented by such litigation costs fell in each of the following five years, thanks in part to restrictions in the Class Action Fairness Act of 2005.

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