Frequencies for first 10,000 rows of prov3520 variable in pos2008 dataset :

 srv: blood |
admin-onsit |
   e-nonres |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,661       76.61       76.61
          N |      2,315       23.15       99.76
          Y |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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