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

Antibiotics |
        RFP |
612=f_ld_an |
    tibio R |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      8,036       80.36       80.36
          U |        153        1.53       81.89
          Y |      1,811       18.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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