Frequencies for first 10,000 rows of ab_anti variable in natlterr2012 dataset :

Antibiotics |
        RFP |
632=f_ab_an |
    tibio R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,163       11.63       11.63
          N |      7,918       79.18       90.81
          U |        426        4.26       95.07
          Y |        493        4.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016