Frequencies for first 10,000 rows of blodpres variable in namcs2015 dataset : Was blood | pressure | taken? | Freq. Percent Cum. ------------+----------------------------------- 0 | 4,529 45.29 45.29 1 | 5,471 54.71 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 25 Oct 2017