Frequencies for first 10,000 rows of ab_anti variable in natlterr2010 dataset :

Antibiotics |
        RFP |
632=f_ab_an |
    tibio R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,656       46.56       46.56
          N |      3,869       38.69       85.25
          U |        976        9.76       95.01
          Y |        499        4.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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