Frequencies for first 10,000 rows of prov2080 variable in pos1994 dataset :

 srv: blood |
       bank |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,940       89.40       89.40
          0 |        261        2.61       92.01
          1 |        505        5.05       97.06
          2 |        255        2.55       99.61
          3 |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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