Frequencies for first 10,000 rows of prov2205 variable in pos1994 dataset :

       srv: |
 laboratory |
(anatomical |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,940       89.40       89.40
          0 |        303        3.03       92.43
          1 |        398        3.98       96.41
          2 |        312        3.12       99.53
          3 |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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