Frequencies for first 10,000 rows of zonenurs variable in nhamcsed2007 dataset : does your | ed use zone | nursing? | Freq. Percent Cum. ------------+----------------------------------- no | 4,745 47.45 47.45 yes | 5,255 52.55 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016