Frequencies for first 10,000 rows of rx4v1c2 variable in namcs2011 dataset :

   For RX4, |
 level 1 of |
MULTUM drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,673       96.73       96.73
        001 |         19        0.19       96.92
        040 |         70        0.70       97.62
        057 |         51        0.51       98.13
        081 |         73        0.73       98.86
        087 |          1        0.01       98.87
        097 |         20        0.20       99.07
        105 |         12        0.12       99.19
        113 |          1        0.01       99.20
        115 |         11        0.11       99.31
        122 |         28        0.28       99.59
        133 |         10        0.10       99.69
        218 |          3        0.03       99.72
        242 |          1        0.01       99.73
        254 |          5        0.05       99.78
        358 |         22        0.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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