Frequencies for first 10,000 rows of totdiag variable in nhamcsopd2005 dataset :

            total |
   diag/screening |
 services ordered |
      or provided |      Freq.     Percent        Cum.
------------------+-----------------------------------
                0 |      1,141       11.41       11.41
                1 |        773        7.73       19.14
                2 |      1,366       13.66       32.80
                3 |      1,746       17.46       50.26
                4 |      1,834       18.34       68.60
                5 |      1,051       10.51       79.11
                6 |        600        6.00       85.11
                7 |        397        3.97       89.08
                8 |        310        3.10       92.18
                9 |        200        2.00       94.18
               10 |        159        1.59       95.77
               11 |         93        0.93       96.70
               12 |         73        0.73       97.43
               13 |         48        0.48       97.91
               14 |         41        0.41       98.32
               15 |         45        0.45       98.77
               16 |         30        0.30       99.07
               17 |         12        0.12       99.19
               18 |          8        0.08       99.27
               19 |          7        0.07       99.34
               20 |          1        0.01       99.35
               21 |          3        0.03       99.38
entire item blank |         62        0.62      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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