Frequencies for first 10,000 rows of chow_sw variable in pos2013 dataset :

       CHOW |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,622       86.22       86.22
          N |      1,319       13.19       99.41
          Y |         59        0.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016