Frequencies for prvdr_ctrl_type_cd variable in hosp_rpt2552_96_2011 dataset :

   provider |
    control |
  type code |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          9       26.47       26.47
          4 |         19       55.88       82.35
          5 |          1        2.94       85.29
          6 |          2        5.88       91.18
          9 |          2        5.88       97.06
         12 |          1        2.94      100.00
------------+-----------------------------------
      Total |         34      100.00

by Jean Roth , jroth@nber.org , 21 Apr 2018