Frequencies for first 10,000 rows of rx1v1c2 variable in namcs2007 dataset :

   for rx1, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,364       93.64       93.64
        001 |        103        1.03       94.67
        040 |         32        0.32       94.99
        057 |        147        1.47       96.46
        081 |         86        0.86       97.32
        087 |          1        0.01       97.33
        097 |         56        0.56       97.89
        105 |         82        0.82       98.71
        115 |          9        0.09       98.80
        122 |         56        0.56       99.36
        133 |         25        0.25       99.61
        218 |          1        0.01       99.62
        242 |          8        0.08       99.70
        254 |          6        0.06       99.76
        358 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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