Frequencies for region variable in prds_hosp10_yr2010 dataset :

     region |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         50        2.15        2.15
          2 |         44        1.89        4.05
          3 |        315       13.56       17.61
          4 |        387       16.66       34.27
          5 |        350       15.07       49.33
          6 |        376       16.19       65.52
          7 |        244       10.50       76.02
          8 |        161        6.93       82.95
          9 |        266       11.45       94.40
         10 |         63        2.71       97.12
          . |         67        2.88      100.00
------------+-----------------------------------
      Total |      2,323      100.00

by Jean Roth , jroth@nber.org , 24 Aug 2018