Frequencies for first 10,000 rows of rx4v1c2 variable in nhamcsed2011 dataset :

   For RX4, |
 level 1 of |
MULTUM drug |
category #2 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,715       97.15       97.15
        001 |         33        0.33       97.48
        040 |         33        0.33       97.81
        057 |         61        0.61       98.42
        081 |         25        0.25       98.67
        087 |          2        0.02       98.69
        105 |          4        0.04       98.73
        115 |          7        0.07       98.80
        122 |        104        1.04       99.84
        133 |          9        0.09       99.93
        242 |          5        0.05       99.98
        358 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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