Frequencies for first 10,000 rows of physn_ext_srvc_onst_nrsdnt_sw variable in 

  Physician |
   Extender |
    Service |
  Onsite To |
    Non-Res |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,097       10.97       10.97
          N |      8,890       88.90       99.87
          Y |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016