Frequencies for first 10,000 rows of rx4v1c1 variable in namcs2007 dataset :

   for rx4, |
 level 1 of |
multum drug |
category #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,566       75.66       75.66
        001 |         81        0.81       76.47
        020 |         13        0.13       76.60
        028 |          2        0.02       76.62
        040 |        465        4.65       81.27
        057 |        468        4.68       85.95
        081 |         36        0.36       86.31
        087 |        128        1.28       87.59
        097 |        133        1.33       88.92
        105 |         75        0.75       89.67
        115 |        141        1.41       91.08
        122 |        228        2.28       93.36
        133 |        110        1.10       94.46
        218 |         34        0.34       94.80
        242 |        127        1.27       96.07
        254 |        137        1.37       97.44
        358 |        254        2.54       99.98
        365 |          1        0.01       99.99
        899 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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