Frequencies for first 10,000 rows of totdiag variable in nhamcsed1996 dataset :

 total # of |
       diag |
   services |
        and |
 procedures |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,316       13.16       13.16
          1 |      2,834       28.34       41.50
          2 |      2,472       24.72       66.22
          3 |      1,394       13.94       80.16
          4 |        818        8.18       88.34
          5 |        504        5.04       93.38
          6 |        325        3.25       96.63
          7 |        191        1.91       98.54
          8 |        103        1.03       99.57
          9 |         30        0.30       99.87
         10 |          9        0.09       99.96
         11 |          3        0.03       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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