Frequencies for first 10,000 rows of prov5675 variable in pos2009 dataset :

 SRV: BLOOD |
       BANK |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |        386        3.86       90.24
          1 |        583        5.83       96.07
          2 |        316        3.16       99.23
          3 |         77        0.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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