Frequencies for first 10,000 rows of physn_srvc_onst_nrsdnt_sw variable in pos2002 dataset :

       srv: |
physician-o |
  nsite-non |
   resident |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,326       73.26       73.26
          N |      2,596       25.96       99.22
          Y |         78        0.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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