Frequencies for first 10,000 rows of prov4235 variable in posclia2006 dataset :

  number of |
       labs |
   directly |
 affiliated |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,749       87.49       87.49
          1 |        599        5.99       93.48
          2 |        303        3.03       96.51
          3 |        170        1.70       98.21
          4 |        105        1.05       99.26
          5 |         45        0.45       99.71
          6 |         12        0.12       99.83
          7 |          9        0.09       99.92
          8 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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