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Animation of EIA Sampling. State by state display of sampling data 1972 – 1989: rate per 100 (percent positive) 1990 – 2007: rate per 10,000 Each year is divided into three classes, taking the difference of the minimum and maximum values and dividing it by three.
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Animation of EIA Sampling • State by state display of sampling data • 1972 – 1989: rate per 100 (percent positive) • 1990 – 2007: rate per 10,000 • Each year is divided into three classes, taking the difference of the minimum and maximum values and dividing it by three.