Frequencies for first 10,000 rows of rx2v1c2 variable in nhamcsopd2007 dataset :

   for rx2, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,513       95.13       95.13
        001 |         56        0.56       95.69
        020 |          1        0.01       95.70
        040 |         24        0.24       95.94
        057 |        108        1.08       97.02
        081 |        107        1.07       98.09
        087 |          1        0.01       98.10
        097 |         36        0.36       98.46
        105 |         70        0.70       99.16
        115 |          8        0.08       99.24
        122 |         55        0.55       99.79
        133 |          7        0.07       99.86
        242 |          4        0.04       99.90
        254 |          2        0.02       99.92
        358 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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