Frequencies for first 10,000 rows of rx5v1c2 variable in nhamcsed2007 dataset :

   for rx5, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,871       98.71       98.71
        001 |         11        0.11       98.82
        040 |         11        0.11       98.93
        057 |         45        0.45       99.38
        081 |         10        0.10       99.48
        097 |          1        0.01       99.49
        105 |         14        0.14       99.63
        115 |          2        0.02       99.65
        122 |         27        0.27       99.92
        133 |          3        0.03       99.95
        242 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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