Frequencies for first 10,000 rows of othimg1 variable in nhamcsopd1995 dataset : other | imaging - | icd-9-cm | procedure - | 4dgt | Freq. Percent Cum. ------------+----------------------------------- 0000 | 9,904 99.04 99.04 6816 | 1 0.01 99.05 7534 | 3 0.03 99.08 7535 | 1 0.01 99.09 8914 | 3 0.03 99.12 8915 | 2 0.02 99.14 8937 | 8 0.08 99.22 8938 | 1 0.01 99.23 8939 | 1 0.01 99.24 8944 | 6 0.06 99.30 8950 | 3 0.03 99.33 8952 | 5 0.05 99.38 8965 | 1 0.01 99.39 9032 | 1 0.01 99.40 9042 | 1 0.01 99.41 9141 | 2 0.02 99.43 9142 | 23 0.23 99.66 9146 | 5 0.05 99.71 9149 | 2 0.02 99.73 9162 | 1 0.01 99.74 9182 | 1 0.01 99.75 9191 | 2 0.02 99.77 9192 | 1 0.01 99.78 9195 | 1 0.01 99.79 9214 | 2 0.02 99.81 9511 | 12 0.12 99.93 9999 | 7 0.07 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016