Frequencies for first 10,000 rows of physn_srvc_onst_nrsdnt_sw variable in pos1997 dataset :

       srv: |
physician-o |
  nsite-non |
   resident |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,410       74.10       74.10
          N |      2,522       25.22       99.32
          Y |         68        0.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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