Frequencies for first 10,000 rows of clia_lab_classification_cd_2 variable in p CLIA_LAB_CL | ASSIFICATIO | N_CD_2 | Freq. Percent Cum. ------------+----------------------------------- 0 | 7,738 77.38 77.38 5 | 38 0.38 77.76 10 | 1 0.01 77.77 . | 2,223 22.23 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 26 Jan 2016