Frequencies for first 10,000 rows of skincanc variable in nhamcsopd1999 dataset :

skin cancer |
 prevention |
 couns/educ |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,956       99.56       99.56
          1 |         44        0.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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