Frequencies for first 10,000 rows of ct_scan_srvc_cd variable in pos2014 datase Services: | CT Scan | Code | Freq. Percent Cum. ------------+----------------------------------- . | 8,592 85.92 85.92 0 | 911 9.11 95.03 1 | 381 3.81 98.84 2 | 77 0.77 99.61 3 | 39 0.39 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 26 Jan 2016