Frequencies for first 10,000 rows of drugcl2 variable in nhamcsopd1992 dataset :

 Drug class |
        for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,341       73.41       73.41
         01 |         23        0.23       73.64
         02 |          4        0.04       73.68
         03 |        206        2.06       75.74
         04 |        137        1.37       77.11
         05 |        455        4.55       81.66
         06 |        146        1.46       83.12
         07 |         23        0.23       83.35
         08 |        109        1.09       84.44
         09 |        146        1.46       85.90
         10 |        188        1.88       87.78
         11 |        206        2.06       89.84
         12 |        117        1.17       91.01
         13 |         76        0.76       91.77
         14 |         30        0.30       92.07
         15 |         63        0.63       92.70
         16 |         12        0.12       92.82
         17 |        278        2.78       95.60
         18 |          6        0.06       95.66
         19 |        262        2.62       98.28
         20 |        172        1.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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