Frequencies for first 10,000 rows of ld_ster variable in natl2016 dataset :

 Steroids Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,683       96.83       96.83
          U |         34        0.34       97.17
          Y |        283        2.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 4 Oct 2017