Frequencies for census variable in prds_hosp10_yr2012 dataset :

     census |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        145        2.33        2.33
          2 |        535        8.59       10.92
          3 |        877       14.08       25.00
          4 |        763       12.25       37.26
          5 |        861       13.83       51.08
          6 |        487        7.82       58.90
          7 |        964       15.48       74.39
          8 |        476        7.64       82.03
          9 |        602        9.67       91.70
         99 |        164        2.63       94.33
          . |        353        5.67      100.00
------------+-----------------------------------
      Total |      6,227      100.00

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