Frequencies for first 10,000 rows of rx4v1c2 variable in namcs2009 dataset :

   for rx4, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,663       96.63       96.63
        001 |         10        0.10       96.73
        040 |         65        0.65       97.38
        057 |         65        0.65       98.03
        081 |        101        1.01       99.04
        087 |          2        0.02       99.06
        097 |         19        0.19       99.25
        105 |         14        0.14       99.39
        115 |          8        0.08       99.47
        122 |         13        0.13       99.60
        133 |          7        0.07       99.67
        242 |          3        0.03       99.70
        254 |          1        0.01       99.71
        358 |         29        0.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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