Frequencies for first 10,000 rows of proc33d variable in namcs2009 dataset : procedure 3 | - 3 digit | Freq. Percent Cum. ------------+----------------------------------- -9 | 9,803 98.03 98.03 039 | 1 0.01 98.04 044 | 9 0.09 98.13 541 | 1 0.01 98.14 601 | 1 0.01 98.15 810 | 1 0.01 98.16 815 | 1 0.01 98.17 861 | 1 0.01 98.18 889 | 1 0.01 98.19 890 | 2 0.02 98.21 891 | 9 0.09 98.30 893 | 78 0.78 99.08 895 | 28 0.28 99.36 897 | 5 0.05 99.41 903 | 11 0.11 99.52 914 | 1 0.01 99.53 921 | 1 0.01 99.54 930 | 1 0.01 99.55 939 | 3 0.03 99.58 950 | 27 0.27 99.85 951 | 1 0.01 99.86 954 | 6 0.06 99.92 992 | 2 0.02 99.94 994 | 4 0.04 99.98 995 | 2 0.02 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016