Frequencies for first 10,000 rows of physn_ext_srvc_onst_nrsdnt_sw variable in 

  Services: |
  Physician |
   Extender |
    On-Site |
    Nonresi |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,597       75.97       75.97
          N |      2,388       23.88       99.85
          Y |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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