Businesses invest three times as much under Democratic presidents.
    Average growth per year under Democratic Presidents: 7.08%
   Average growth per year under Republican Presidents: 2.94%
   Average growth under the Bush II Administration: 1.53%

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For this data set, the percentage growth was found by taking the given year’s total non-residential investment figure from Table B-19 ERP, subtracting it from the previous year’s figure, and dividing the difference by the previous year’s figure. For example, if x represents the total non-residential fixed investment for a given year, then (1991x – 1990x)/1990x = %growth for 1991.