Compound annual growth rate
The "Compound annual growth rate" unit of measure is the only item for which you need to select two years, a "Begin year" and an "End year." The compound annual growth rate will then be computed for the statistic you have selected. The compound annual growth rate is computed as an annually compounded rate, not as a simple arithmetic average of the annual growth rates. It is the nth root of the ratio of the ending value to the beginning value, minus 1.0, and times 100 (to express the value as a percent per year), where the "n" in "the nthroot" is equal to the end year minus the begin year. Algebraically, the compound annual growth rate for a value is computed as (((End value / Begin value)^p/n )-1)*100, where p=periodicity (4 for quarterly, 1 for annual).