Frequencies for first 10,000 rows of rx7v1c2 variable in nhamcsed2007 dataset :

   for rx7, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,955       99.55       99.55
        001 |          1        0.01       99.56
        040 |          4        0.04       99.60
        057 |         11        0.11       99.71
        081 |          9        0.09       99.80
        105 |          2        0.02       99.82
        115 |          3        0.03       99.85
        122 |         11        0.11       99.96
        133 |          2        0.02       99.98
        242 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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