The reliability of percentage remaining (50% of the remaining rule) that has been used by scientists for the relative half-lives elapsed in responding to radiometric dating method is in question.

FORBES: Young Earth Creationists Whipsawed By IRS

Stated differently, based on the data provided by the Census Bureau and the Internal Revenue Service, the relative tax burden of the top 5% of American earners compared with the remaining 95% has grown from roughly three-to-one prior to 1980 to almost six-to-one today.

WSJ: Lawrence Lindsey: Geithner and the 'Privilege' of Being American