Frequencies for first 10,000 rows of ld_ster variable in natlterr2015 dataset :

 Steroids Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,078       10.78       10.78
          N |      8,651       86.51       97.29
          U |        102        1.02       98.31
          Y |        169        1.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016