Frequencies for first 10,000 rows of totserv variable in namcs2011 dataset :

 Total # of |
screen/diag |
   /non-med |
  treatment |
   services |
ordered/pro |
      vided |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        256        2.56        2.56
          1 |        545        5.45        8.01
          2 |      1,145       11.45       19.46
          3 |      1,910       19.10       38.56
          4 |      2,102       21.02       59.58
          5 |      1,466       14.66       74.24
          6 |        977        9.77       84.01
          7 |        563        5.63       89.64
          8 |        404        4.04       93.68
          9 |        244        2.44       96.12
         10 |        157        1.57       97.69
         11 |         68        0.68       98.37
         12 |         57        0.57       98.94
         13 |         34        0.34       99.28
         14 |         22        0.22       99.50
         15 |         15        0.15       99.65
         16 |         13        0.13       99.78
         17 |         10        0.10       99.88
         18 |          5        0.05       99.93
         19 |          5        0.05       99.98
         20 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016