Frequencies for first 10,000 rows of drg4ing2 variable in nhamcsed1993 dataset :

 ingredient |
code #2 for |
    drug #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,920       99.20       99.20
      50005 |          1        0.01       99.21
      50530 |          1        0.01       99.22
      51340 |          9        0.09       99.31
      52023 |          1        0.01       99.32
      52490 |          1        0.01       99.33
      52650 |          8        0.08       99.41
      52720 |          2        0.02       99.43
      52825 |          2        0.02       99.45
      53050 |          1        0.01       99.46
      53070 |          1        0.01       99.47
      53175 |         12        0.12       99.59
      53635 |          1        0.01       99.60
      53895 |          2        0.02       99.62
      54094 |          6        0.06       99.68
      54400 |          1        0.01       99.69
      54455 |          2        0.02       99.71
      54465 |          1        0.01       99.72
      54595 |          1        0.01       99.73
      54890 |         10        0.10       99.83
      54960 |          2        0.02       99.85
      55590 |          1        0.01       99.86
      55710 |          1        0.01       99.87
      55925 |          2        0.02       99.89
      55997 |          6        0.06       99.95
      56020 |          1        0.01       99.96
      57033 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016