Frequencies for first 10,000 rows of prov2205 variable in pos1996 dataset :

       srv: |
 laboratory |
(anatomical |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,803       88.03       88.03
          0 |        349        3.49       91.52
          1 |        429        4.29       95.81
          2 |        365        3.65       99.46
          3 |         54        0.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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