Frequencies for s5_c2_21 variable in hcris2552_10_2014 dataset :

    initial |
  physician |
    payment |
     method |
      (y/n) |
    s500000 |
02100 00200 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,209       99.38       99.38
          X |         39        0.62      100.00
------------+-----------------------------------
      Total |      6,248      100.00

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