Frequencies for first 10,000 rows of amb2 variable in namcs1999 dataset : ambulatory | surg | procedure | #2 - 4 dgt | Freq. Percent Cum. ------------+----------------------------------- 0000 | 9,952 99.52 99.52 0825 | 2 0.02 99.54 1371 | 1 0.01 99.55 2109 | 1 0.01 99.56 2749 | 1 0.01 99.57 4524 | 2 0.02 99.59 4525 | 1 0.01 99.60 4834 | 1 0.01 99.61 6739 | 1 0.01 99.62 6909 | 1 0.01 99.63 7021 | 1 0.01 99.64 8192 | 3 0.03 99.67 8394 | 1 0.01 99.68 8601 | 1 0.01 99.69 8604 | 1 0.01 99.70 8611 | 7 0.07 99.77 863- | 16 0.16 99.93 8659 | 1 0.01 99.94 9354 | 1 0.01 99.95 9357 | 1 0.01 99.96 9639 | 1 0.01 99.97 9659 | 1 0.01 99.98 9769 | 1 0.01 99.99 9999 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016