Frequencies for first 10,000 rows of psych_unit_sw variable in pos2009 dataset :

PSYCHIATRIC |
       UNIT |
  INDICATOR |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,691       96.91       96.91
          Y |        309        3.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017