Frequencies for first 10,000 rows of mlt_site_excptn_sw variable in posclia2016 dataset :

   Multiple |
       Site |
Certificate |
  Indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,550       95.50       95.50
          Y |        450        4.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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