Frequencies for first 10,000 rows of prov2205 variable in pos2008 dataset :

       srv: |
 laboratory |
(anatomical |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |        510        5.10       91.65
          1 |        392        3.92       95.57
          2 |        372        3.72       99.29
          3 |         71        0.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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