Frequencies for first 10,000 rows of physn_srvc_onst_nrsdnt_sw variable in pos2004 dataset :

       srv: |
physician-o |
  nsite-non |
   resident |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,489       74.89       74.89
          N |      2,439       24.39       99.28
          Y |         72        0.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017