Frequencies for first 10,000 rows of prov2205 variable in pos2006 dataset :

       srv: |
 laboratory |
(anatomical |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,710       87.10       87.10
          0 |        460        4.60       91.70
          1 |        397        3.97       95.67
          2 |        370        3.70       99.37
          3 |         63        0.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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