Frequencies for first 10,000 rows of PHYSN_EXT_SRVC_ONST_RSDNT_SW variable in pos2011 dataset :

  Physician |
   Extender |
    Service |
  Onsite To |
   Resident |
     Switch |
    (F37A1) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        354        3.54        3.54
          N |      8,990       89.90       93.44
          Y |        656        6.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2019