Frequencies for first 10,000 rows of rx1v1c2 variable in nhamcsed2009 dataset :

   for rx1, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,617       86.17       86.17
        001 |        156        1.56       87.73
        040 |        186        1.86       89.59
        057 |        308        3.08       92.67
        081 |        165        1.65       94.32
        097 |         13        0.13       94.45
        105 |         15        0.15       94.60
        113 |          1        0.01       94.61
        115 |         12        0.12       94.73
        122 |        482        4.82       99.55
        133 |         22        0.22       99.77
        218 |          4        0.04       99.81
        242 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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