Frequencies for first 10,000 rows of rx7v1c2 variable in nhamcsopd2007 dataset :

   for rx7, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,885       98.85       98.85
        001 |         10        0.10       98.95
        040 |          5        0.05       99.00
        057 |         22        0.22       99.22
        081 |         41        0.41       99.63
        097 |          3        0.03       99.66
        105 |         12        0.12       99.78
        115 |          6        0.06       99.84
        122 |          6        0.06       99.90
        133 |          3        0.03       99.93
        242 |          1        0.01       99.94
        254 |          3        0.03       99.97
        358 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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