Frequencies for first 10,000 rows of cl_srvc_onst_rsdnt_sw variable in pos1994 dataset :

       srv: |
   clinical |
lab-onsite- |
  residents |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,565       75.65       75.65
          N |        508        5.08       80.73
          Y |      1,927       19.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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