Frequencies for first 10,000 rows of prov4235 variable in posclia2008 dataset :

  number of |
       labs |
   directly |
 affiliated |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,496       84.96       84.96
          1 |        745        7.45       92.41
          2 |        389        3.89       96.30
          3 |        174        1.74       98.04
          4 |        133        1.33       99.37
          5 |         36        0.36       99.73
          6 |          6        0.06       99.79
          7 |         11        0.11       99.90
          8 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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