Frequencies for first 10,000 rows of drug_seq variable in drug2016q3 dataset :

     Unique |
 number for |
identifying |
 a drug for |
     a Case |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,363       13.63       13.63
          2 |      1,184       11.84       25.47
          3 |      1,021       10.21       35.68
          4 |        866        8.66       44.34
          5 |        752        7.52       51.86
          6 |        663        6.63       58.49
          7 |        571        5.71       64.20
          8 |        481        4.81       69.01
          9 |        407        4.07       73.08
         10 |        350        3.50       76.58
         11 |        287        2.87       79.45
         12 |        247        2.47       81.92
         13 |        214        2.14       84.06
         14 |        183        1.83       85.89
         15 |        157        1.57       87.46
         16 |        137        1.37       88.83
         17 |        115        1.15       89.98
         18 |        100        1.00       90.98
         19 |         92        0.92       91.90
         20 |         82        0.82       92.72
         21 |         76        0.76       93.48
         22 |         65        0.65       94.13
         23 |         61        0.61       94.74
         24 |         58        0.58       95.32
         25 |         51        0.51       95.83
         26 |         44        0.44       96.27
         27 |         41        0.41       96.68
         28 |         33        0.33       97.01
         29 |         29        0.29       97.30
         30 |         29        0.29       97.59
         31 |         26        0.26       97.85
         32 |         25        0.25       98.10
         33 |         24        0.24       98.34
         34 |         20        0.20       98.54
         35 |         19        0.19       98.73
         36 |         17        0.17       98.90
         37 |         17        0.17       99.07
         38 |         14        0.14       99.21
         39 |         11        0.11       99.32
         40 |         10        0.10       99.42
         41 |          8        0.08       99.50
         42 |          7        0.07       99.57
         43 |          7        0.07       99.64
         44 |          7        0.07       99.71
         45 |          7        0.07       99.78
         46 |          6        0.06       99.84
         47 |          3        0.03       99.87
         48 |          3        0.03       99.90
         49 |          1        0.01       99.91
         50 |          1        0.01       99.92
         51 |          1        0.01       99.93
         52 |          1        0.01       99.94
         53 |          1        0.01       99.95
         54 |          1        0.01       99.96
         55 |          1        0.01       99.97
         56 |          1        0.01       99.98
         57 |          1        0.01       99.99
         58 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 6 Apr 2017