Frequencies for first 10,000 rows of drug_seq variable in drug2015q3 dataset :

     Unique |
 number for |
identifying |
 a drug for |
     a Case |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,387       13.87       13.87
          2 |      1,095       10.95       24.82
          3 |        899        8.99       33.81
          4 |        768        7.68       41.49
          5 |        693        6.93       48.42
          6 |        616        6.16       54.58
          7 |        523        5.23       59.81
          8 |        461        4.61       64.42
          9 |        404        4.04       68.46
         10 |        357        3.57       72.03
         11 |        321        3.21       75.24
         12 |        277        2.77       78.01
         13 |        246        2.46       80.47
         14 |        219        2.19       82.66
         15 |        192        1.92       84.58
         16 |        169        1.69       86.27
         17 |        139        1.39       87.66
         18 |        125        1.25       88.91
         19 |        104        1.04       89.95
         20 |         94        0.94       90.89
         21 |         80        0.80       91.69
         22 |         69        0.69       92.38
         23 |         58        0.58       92.96
         24 |         52        0.52       93.48
         25 |         50        0.50       93.98
         26 |         45        0.45       94.43
         27 |         40        0.40       94.83
         28 |         38        0.38       95.21
         29 |         33        0.33       95.54
         30 |         33        0.33       95.87
         31 |         31        0.31       96.18
         32 |         27        0.27       96.45
         33 |         27        0.27       96.72
         34 |         24        0.24       96.96
         35 |         24        0.24       97.20
         36 |         19        0.19       97.39
         37 |         16        0.16       97.55
         38 |         15        0.15       97.70
         39 |         14        0.14       97.84
         40 |         14        0.14       97.98
         41 |         11        0.11       98.09
         42 |         12        0.12       98.21
         43 |          9        0.09       98.30
         44 |         11        0.11       98.41
         45 |          8        0.08       98.49
         46 |         10        0.10       98.59
         47 |          9        0.09       98.68
         48 |          8        0.08       98.76
         49 |          8        0.08       98.84
         50 |          8        0.08       98.92
         51 |          5        0.05       98.97
         52 |          5        0.05       99.02
         53 |          4        0.04       99.06
         54 |          5        0.05       99.11
         55 |          4        0.04       99.15
         56 |          5        0.05       99.20
         57 |          3        0.03       99.23
         58 |          4        0.04       99.27
         59 |          3        0.03       99.30
         60 |          4        0.04       99.34
         61 |          3        0.03       99.37
         62 |          4        0.04       99.41
         63 |          3        0.03       99.44
         64 |          4        0.04       99.48
         65 |          2        0.02       99.50
         66 |          3        0.03       99.53
         67 |          2        0.02       99.55
         68 |          3        0.03       99.58
         69 |          2        0.02       99.60
         70 |          3        0.03       99.63
         71 |          2        0.02       99.65
         72 |          2        0.02       99.67
         73 |          1        0.01       99.68
         74 |          2        0.02       99.70
         75 |          1        0.01       99.71
         76 |          2        0.02       99.73
         77 |          1        0.01       99.74
         78 |          2        0.02       99.76
         79 |          1        0.01       99.77
         80 |          2        0.02       99.79
         81 |          1        0.01       99.80
         82 |          2        0.02       99.82
         83 |          1        0.01       99.83
         84 |          2        0.02       99.85
         85 |          1        0.01       99.86
         86 |          2        0.02       99.88
         87 |          1        0.01       99.89
         88 |          2        0.02       99.91
         89 |          1        0.01       99.92
         90 |          2        0.02       99.94
         91 |          1        0.01       99.95
         92 |          1        0.01       99.96
         94 |          1        0.01       99.97
         96 |          1        0.01       99.98
         98 |          1        0.01       99.99
        100 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2017