Frequencies for first 10,000 rows of rx7v1c2 variable in namcs2006 dataset :

   for rx7, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,910       99.10       99.10
        001 |          3        0.03       99.13
        040 |          9        0.09       99.22
        057 |         17        0.17       99.39
        081 |         35        0.35       99.74
        097 |          3        0.03       99.77
        105 |          6        0.06       99.83
        115 |          4        0.04       99.87
        122 |          3        0.03       99.90
        133 |          2        0.02       99.92
        242 |          1        0.01       99.93
        358 |          6        0.06       99.99
        899 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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