Frequencies for first 10,000 rows of amb2 variable in namcs2000 dataset : ambulatory | surg | procedure | #2 - 4 dgt | Freq. Percent Cum. ------------+----------------------------------- 0000 | 9,979 99.79 99.79 0820 | 1 0.01 99.80 1829 | 1 0.01 99.81 6909 | 1 0.01 99.82 7904 | 1 0.01 99.83 8100 | 1 0.01 99.84 8192 | 1 0.01 99.85 8519 | 4 0.04 99.89 8520 | 1 0.01 99.90 8609 | 1 0.01 99.91 863- | 1 0.01 99.92 8922 | 1 0.01 99.93 9162 | 1 0.01 99.94 9357 | 2 0.02 99.96 9659 | 1 0.01 99.97 9787 | 1 0.01 99.98 9820 | 1 0.01 99.99 9828 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016