Frequencies for first 10,000 rows of prov2205 variable in pos1992 dataset :

       srv: |
 laboratory |
(anatomical |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,851       88.51       88.51
          0 |        314        3.14       91.65
          1 |        432        4.32       95.97
          2 |        356        3.56       99.53
          3 |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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