Frequencies for region variable in prds_hosp10_yr2011 dataset :

     region |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        249        4.05        4.05
          2 |        369        6.00       10.05
          3 |        480        7.80       17.85
          4 |      1,090       17.72       35.58
          5 |      1,025       16.67       52.24
          6 |      1,015       16.50       68.75
          7 |        506        8.23       76.98
          8 |        338        5.50       82.47
          9 |        565        9.19       91.66
         10 |        227        3.69       95.35
          . |        286        4.65      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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