Frequencies for first 10,000 rows of skin variable in namcs2005 dataset :

  skin exam |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,740       87.40       87.40
          1 |      1,260       12.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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