Frequencies for first 10,000 rows of prov3520 variable in pos2006 dataset :

 srv: blood |
admin-onsit |
   e-nonres |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,456       74.56       74.56
          N |      2,514       25.14       99.70
          Y |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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