Frequencies for first 10,000 rows of prov3520 variable in pos2002 dataset :

 srv: blood |
admin-onsit |
   e-nonres |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,326       73.26       73.26
          N |      2,641       26.41       99.67
          Y |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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