Frequencies for first 10,000 rows of rx7v1c2 variable in namcs2007 dataset :

   for rx7, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,890       98.90       98.90
        001 |          5        0.05       98.95
        040 |          7        0.07       99.02
        057 |         20        0.20       99.22
        081 |         37        0.37       99.59
        087 |          1        0.01       99.60
        097 |          9        0.09       99.69
        105 |         10        0.10       99.79
        115 |          4        0.04       99.83
        122 |          3        0.03       99.86
        242 |          3        0.03       99.89
        358 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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