Frequencies for first 10,000 rows of prov4235 variable in posclia2010 dataset :

  number of |
       labs |
   directly |
 affiliated |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,407       84.07       84.07
          1 |        762        7.62       91.69
          2 |        392        3.92       95.61
          3 |        208        2.08       97.69
          4 |        169        1.69       99.38
          5 |         36        0.36       99.74
          6 |          8        0.08       99.82
          7 |          8        0.08       99.90
          8 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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