Frequencies for ndc variable in nadacc20170531 dataset : National | Drug Code | (NDC) | Freq. Percent Cum. ------------+----------------------------------- 00037024523 | 1 2.33 2.33 00037682210 | 1 2.33 4.65 00121079916 | 1 2.33 6.98 00173047900 | 1 2.33 9.30 00378107001 | 1 2.33 11.63 00378107101 | 1 2.33 13.95 00378410591 | 1 2.33 16.28 00406896001 | 1 2.33 18.60 00406896101 | 1 2.33 20.93 00472023516 | 1 2.33 23.26 00555095402 | 1 2.33 25.58 00555095502 | 1 2.33 27.91 00603138458 | 1 2.33 30.23 00781614116 | 1 2.33 32.56 00904652304 | 1 2.33 34.88 00904652306 | 1 2.33 37.21 16714035801 | 1 2.33 39.53 24208041010 | 1 2.33 41.86 31722055760 | 1 2.33 44.19 31722057447 | 1 2.33 46.51 45963030309 | 1 2.33 48.84 45963030409 | 1 2.33 51.16 50383002510 | 1 2.33 53.49 50383024116 | 1 2.33 55.81 51079020401 | 1 2.33 58.14 51079020406 | 1 2.33 60.47 51672413609 | 1 2.33 62.79 51862034490 | 1 2.33 65.12 51862034590 | 1 2.33 67.44 51991065116 | 1 2.33 69.77 54505032709 | 1 2.33 72.09 54505032809 | 1 2.33 74.42 54838054880 | 1 2.33 76.74 60432083116 | 1 2.33 79.07 60505036302 | 1 2.33 81.40 60505358306 | 1 2.33 83.72 60687014111 | 1 2.33 86.05 60687014121 | 1 2.33 88.37 65862007360 | 1 2.33 90.70 68084002111 | 1 2.33 93.02 68084002121 | 1 2.33 95.35 68180009901 | 1 2.33 97.67 68180011601 | 1 2.33 100.00 ------------+----------------------------------- Total | 43 100.00 by Jean Roth , jroth@nber.org , 10 Feb 2018