Frequencies for first 10,000 rows of ab_anti variable in natl2013 dataset :

Antibiotics |
        RFP |
632=f_ab_an |
    tibio R |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,515       95.15       95.15
          U |        310        3.10       98.25
          Y |        175        1.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015