Frequencies for first 10,000 rows of rx4v1c2 variable in namcs2010 dataset :

   for rx4, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,632       96.32       96.32
        001 |         17        0.17       96.49
        040 |         80        0.80       97.29
        057 |         48        0.48       97.77
        081 |        105        1.05       98.82
        087 |          2        0.02       98.84
        097 |         26        0.26       99.10
        105 |         21        0.21       99.31
        115 |         13        0.13       99.44
        122 |         30        0.30       99.74
        133 |          6        0.06       99.80
        218 |          1        0.01       99.81
        242 |          3        0.03       99.84
        254 |          3        0.03       99.87
        358 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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