Frequencies for first 10,000 rows of prov3495 variable in pos1999 dataset :

       srv: |
   clinical |
lab-offsite |
  -resident |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,387       73.87       73.87
          N |      1,979       19.79       93.66
          Y |        634        6.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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