Frequencies for first 10,000 rows of rx3v1c2 variable in nhamcsopd2009 dataset :

   for rx3, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,550       95.50       95.50
        001 |         38        0.38       95.88
        040 |         66        0.66       96.54
        057 |         81        0.81       97.35
        081 |        100        1.00       98.35
        087 |          1        0.01       98.36
        097 |         32        0.32       98.68
        105 |         22        0.22       98.90
        113 |          3        0.03       98.93
        115 |         13        0.13       99.06
        122 |         51        0.51       99.57
        133 |         17        0.17       99.74
        218 |          1        0.01       99.75
        242 |          2        0.02       99.77
        254 |          2        0.02       99.79
        331 |          7        0.07       99.86
        358 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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