Frequencies for first 10,000 rows of skin variable in namcs1998 dataset :

  skin exam |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,287       92.87       92.87
          1 |        713        7.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016