Frequencies for first 10,000 rows of totdiag variable in nhamcsed2001 dataset :

      total |
  number of |
 diagnostic |
   services |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,237       12.37       12.37
          1 |      2,875       28.75       41.12
          2 |      1,930       19.30       60.42
          3 |      1,026       10.26       70.68
          4 |        608        6.08       76.76
          5 |        419        4.19       80.95
          6 |        355        3.55       84.50
          7 |        351        3.51       88.01
          8 |        282        2.82       90.83
          9 |        258        2.58       93.41
         10 |        203        2.03       95.44
         11 |        116        1.16       96.60
         12 |         72        0.72       97.32
         13 |         29        0.29       97.61
         14 |         13        0.13       97.74
         15 |          9        0.09       97.83
         16 |          2        0.02       97.85
         17 |          1        0.01       97.86
         18 |          2        0.02       97.88
         99 |        212        2.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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