Frequencies for first 10,000 rows of ab_anti variable in natlterr2006 dataset :

Antibiotics |
        RFP |
632=f_ab_an |
    tibio R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,275       62.75       62.75
          N |      3,397       33.97       96.72
          U |          1        0.01       96.73
          Y |        327        3.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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