Frequencies for first 10,000 rows of chow_sw variable in pos2015 dataset :

       CHOW |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,865       88.65       88.65
          N |      1,091       10.91       99.56
          Y |         44        0.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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