Frequencies for s5_c1_21 variable in prds_hosp10_yr2017 dataset :

        MCP |
  Physician |
    Payment |
     Method |
      (Y/N) |
    S500000 |
      02100 |
      00100 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,608       96.24       96.24
          X |        141        3.76      100.00
------------+-----------------------------------
      Total |      3,749      100.00

by Jean Roth , jroth@nber.org , 26 Oct 2018