Frequencies for first 10,000 rows of prov2080 variable in pos1992 dataset :

 srv: blood |
       bank |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,851       88.51       88.51
          0 |        279        2.79       91.30
          1 |        557        5.57       96.87
          2 |        279        2.79       99.66
          3 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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