Frequencies for first 10,000 rows of prov3525 variable in pos2007 dataset :

 srv: blood |
admin-offsi |
te-resident |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,522       75.22       75.22
          N |      2,235       22.35       97.57
          Y |        243        2.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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