Frequencies for first 10,000 rows of physn_srvc_onst_nrsdnt_sw variable in pos2007 dataset :

       srv: |
physician-o |
  nsite-non |
   resident |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,522       75.22       75.22
          N |      2,414       24.14       99.36
          Y |         64        0.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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