Frequencies for first 10,000 rows of totserv variable in namcs2010 dataset :

      total |
diag/screen |
    /nonmed |
  treatment |
   services |
ordered/pro |
      vided |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        250        2.50        2.50
          1 |        548        5.48        7.98
          2 |      1,418       14.18       22.16
          3 |      2,128       21.28       43.44
          4 |      1,998       19.98       63.42
          5 |      1,354       13.54       76.96
          6 |        896        8.96       85.92
          7 |        497        4.97       90.89
          8 |        341        3.41       94.30
          9 |        237        2.37       96.67
         10 |        128        1.28       97.95
         11 |         87        0.87       98.82
         12 |         31        0.31       99.13
         13 |         33        0.33       99.46
         14 |         22        0.22       99.68
         15 |         16        0.16       99.84
         16 |          5        0.05       99.89
         17 |          4        0.04       99.93
         18 |          1        0.01       99.94
         19 |          1        0.01       99.95
         20 |          2        0.02       99.97
         21 |          2        0.02       99.99
         23 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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