Frequencies for first 10,000 rows of proc4 variable in nhamcsopd2011 dataset : Procedure 4 | Freq. Percent Cum. ------------+----------------------------------- -9 | 9,802 98.02 98.02 0045 | 1 0.01 98.03 0639 | 1 0.01 98.04 0821 | 1 0.01 98.05 0919 | 1 0.01 98.06 1269 | 1 0.01 98.07 1279 | 1 0.01 98.08 1319 | 2 0.02 98.10 1364 | 1 0.01 98.11 1371 | 1 0.01 98.12 282- | 2 0.02 98.14 311- | 1 0.01 98.15 3229 | 1 0.01 98.16 3961 | 1 0.01 98.17 3992 | 1 0.01 98.18 4023 | 1 0.01 98.19 5123 | 2 0.02 98.21 5300 | 2 0.02 98.23 5343 | 2 0.02 98.25 5359 | 3 0.03 98.28 5421 | 1 0.01 98.29 543- | 2 0.02 98.31 6561 | 1 0.01 98.32 697- | 1 0.01 98.33 8097 | 1 0.01 98.34 8100 | 1 0.01 98.35 8192 | 1 0.01 98.36 8591 | 1 0.01 98.37 8619 | 3 0.03 98.40 8628 | 1 0.01 98.41 863- | 7 0.07 98.48 8703 | 1 0.01 98.49 8773 | 2 0.02 98.51 8841 | 2 0.02 98.53 8913 | 1 0.01 98.54 8914 | 1 0.01 98.55 8935 | 1 0.01 98.56 8937 | 17 0.17 98.73 8938 | 37 0.37 99.10 8939 | 4 0.04 99.14 8959 | 3 0.03 99.17 9032 | 6 0.06 99.23 9092 | 1 0.01 99.24 9132 | 4 0.04 99.28 9149 | 1 0.01 99.29 9202 | 1 0.01 99.30 9390 | 1 0.01 99.31 9411 | 1 0.01 99.32 9503 | 1 0.01 99.33 9509 | 50 0.50 99.83 9547 | 3 0.03 99.86 9604 | 1 0.01 99.87 9959 | 13 0.13 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016