Frequencies for first 10,000 rows of chow_sw variable in pos2016 dataset :

       CHOW |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,967       89.67       89.67
          N |        992        9.92       99.59
          Y |         41        0.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Jan 2017