Frequencies for s5_c2_21 variable in hcris2552_10_2011 dataset :

    initial |
  physician |
    payment |
     method |
      (y/n) |
    s500000 |
02100 00200 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,101       99.20       99.20
          N |          1        0.02       99.22
          X |         48        0.78      100.00
------------+-----------------------------------
      Total |      6,150      100.00

by Jean Roth , jroth@nber.org , 23 Aug 2018