Frequencies for first 10,000 rows of prov2205 variable in pos2000 dataset :

       srv: |
 laboratory |
(anatomical |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,871       88.71       88.71
          0 |        355        3.55       92.26
          1 |        384        3.84       96.10
          2 |        337        3.37       99.47
          3 |         53        0.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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