Frequencies for first 10,000 rows of totdiag variable in nhamcsed1995 dataset :

 total # of |
       diag |
   services |
        and |
 procedures |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,382       13.82       13.82
          1 |      3,037       30.37       44.19
          2 |      2,514       25.14       69.33
          3 |      1,256       12.56       81.89
          4 |        731        7.31       89.20
          5 |        445        4.45       93.65
          6 |        306        3.06       96.71
          7 |        188        1.88       98.59
          8 |         99        0.99       99.58
          9 |         25        0.25       99.83
         10 |         12        0.12       99.95
         11 |          1        0.01       99.96
         12 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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