Frequencies for first 10,000 rows of prov2205 variable in pos1999 dataset :

       srv: |
 laboratory |
(anatomical |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,885       88.85       88.85
          0 |        340        3.40       92.25
          1 |        391        3.91       96.16
          2 |        333        3.33       99.49
          3 |         51        0.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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