Frequencies for first 10,000 rows of casemix variable in psfhos201607 dataset :

   Case Mix |
      Index |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,797       97.97       97.97
      .0001 |        182        1.82       99.79
      .0007 |         14        0.14       99.93
          1 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Feb 2018