Frequencies for first 10,000 rows of prov2080 variable in pos1991 dataset :

 srv: blood |
       bank |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,770       87.70       87.70
          0 |        295        2.95       90.65
          1 |        597        5.97       96.62
          2 |        303        3.03       99.65
          3 |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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