Frequencies for first 10,000 rows of rx7v1c2 variable in nhamcsed2009 dataset :

   for rx7, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,948       99.48       99.48
        001 |          4        0.04       99.52
        040 |         10        0.10       99.62
        057 |         17        0.17       99.79
        081 |          3        0.03       99.82
        115 |          2        0.02       99.84
        122 |         13        0.13       99.97
        133 |          1        0.01       99.98
        242 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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