Frequencies for first 10,000 rows of rx7v1c2 variable in nhamcsopd2008 dataset :

   for rx7, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,854       98.54       98.54
        001 |          7        0.07       98.61
        020 |          1        0.01       98.62
        040 |         33        0.33       98.95
        057 |         14        0.14       99.09
        081 |         45        0.45       99.54
        097 |          4        0.04       99.58
        105 |         10        0.10       99.68
        115 |         10        0.10       99.78
        122 |         13        0.13       99.91
        133 |          1        0.01       99.92
        218 |          2        0.02       99.94
        358 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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