Frequencies for first 10,000 rows of prov2205 variable in pos2007 dataset :

       srv: |
 laboratory |
(anatomical |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,682       86.82       86.82
          0 |        488        4.88       91.70
          1 |        395        3.95       95.65
          2 |        369        3.69       99.34
          3 |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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