Frequencies for first 10,000 rows of rx2v1c2 variable in nhamcsopd2010 dataset :

   for rx2, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,382       93.82       93.82
        001 |         63        0.63       94.45
        020 |          2        0.02       94.47
        040 |        104        1.04       95.51
        057 |        107        1.07       96.58
        081 |        114        1.14       97.72
        097 |         30        0.30       98.02
        105 |         27        0.27       98.29
        113 |          2        0.02       98.31
        115 |         10        0.10       98.41
        122 |         95        0.95       99.36
        133 |         25        0.25       99.61
        218 |         12        0.12       99.73
        242 |          2        0.02       99.75
        254 |          6        0.06       99.81
        358 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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