Frequencies for first 10,000 rows of prov3485 variable in pos2004 dataset :

       srv: |
   clinical |
lab-onsite- |
  residents |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,489       74.89       74.89
          N |        517        5.17       80.06
          Y |      1,994       19.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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