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If the image above appears blurry, or you would like to see a larger image, please view the full-sized image of the RLR diagram.
Add 4.644m to data values 1970-1974 to refer to RLR
Add 4.644m to data values 1976 onwards to refer to RLR
RLR is 10.539m below primary benchmark 2780 A 1981