Frequencies for first 10,000 rows of rx7v1c1 variable in namcs2007 dataset :

   for rx7, |
 level 1 of |
multum drug |
category #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,070       90.70       90.70
        001 |         23        0.23       90.93
        020 |          4        0.04       90.97
        028 |          1        0.01       90.98
        040 |        158        1.58       92.56
        057 |        186        1.86       94.42
        081 |         19        0.19       94.61
        087 |         66        0.66       95.27
        097 |         42        0.42       95.69
        105 |         28        0.28       95.97
        115 |         76        0.76       96.73
        122 |         79        0.79       97.52
        133 |         39        0.39       97.91
        218 |         28        0.28       98.19
        242 |         55        0.55       98.74
        254 |          9        0.09       98.83
        358 |        117        1.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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