Frequencies for first 10,000 rows of prov3485 variable in pos2006 dataset :

       srv: |
   clinical |
lab-onsite- |
  residents |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,456       74.56       74.56
          N |        553        5.53       80.09
          Y |      1,991       19.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016