Frequencies for first 10,000 rows of totdiag variable in nhamcsed2002 dataset :

      total |
  number of |
 diagnostic |
   services |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        975        9.75        9.75
          1 |      3,086       30.86       40.61
          2 |      2,045       20.45       61.06
          3 |        988        9.88       70.94
          4 |        590        5.90       76.84
          5 |        423        4.23       81.07
          6 |        388        3.88       84.95
          7 |        333        3.33       88.28
          8 |        268        2.68       90.96
          9 |        227        2.27       93.23
         10 |        183        1.83       95.06
         11 |        158        1.58       96.64
         12 |         88        0.88       97.52
         13 |         47        0.47       97.99
         14 |         29        0.29       98.28
         15 |         15        0.15       98.43
         16 |          5        0.05       98.48
         17 |          6        0.06       98.54
         18 |          1        0.01       98.55
         19 |          1        0.01       98.56
         99 |        144        1.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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