Frequencies for first 10,000 rows of rx6v1c2 variable in nhamcsed2007 dataset :

   for rx6, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,921       99.21       99.21
        001 |          7        0.07       99.28
        040 |          9        0.09       99.37
        057 |         20        0.20       99.57
        081 |          7        0.07       99.64
        097 |          1        0.01       99.65
        105 |          7        0.07       99.72
        115 |          4        0.04       99.76
        122 |         19        0.19       99.95
        133 |          3        0.03       99.98
        242 |          1        0.01       99.99
        358 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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