Frequencies for first 10,000 rows of prov2205 variable in pos1995 dataset :

       srv: |
 laboratory |
(anatomical |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,933       89.33       89.33
          0 |        314        3.14       92.47
          1 |        393        3.93       96.40
          2 |        310        3.10       99.50
          3 |         50        0.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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