Frequencies for first 10,000 rows of wic variable in natlterr2014 dataset :

  WIC Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,077       10.77       10.77
          N |      2,473       24.73       35.50
          U |        279        2.79       38.29
          Y |      6,171       61.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016