Frequencies for first 10,000 rows of totdiag variable in namcs2008 dataset :

            total |
   diag/screening |
         services |
 ordered/provided |      Freq.     Percent        Cum.
------------------+-----------------------------------
entire item blank |         27        0.27        0.27
                0 |        355        3.55        3.82
                1 |        483        4.83        8.65
                2 |      1,396       13.96       22.61
                3 |      2,320       23.20       45.81
                4 |      2,234       22.34       68.15
                5 |      1,243       12.43       80.58
                6 |        664        6.64       87.22
                7 |        421        4.21       91.43
                8 |        302        3.02       94.45
                9 |        213        2.13       96.58
               10 |        154        1.54       98.12
               11 |         77        0.77       98.89
               12 |         47        0.47       99.36
               13 |         24        0.24       99.60
               14 |         15        0.15       99.75
               15 |         15        0.15       99.90
               16 |          5        0.05       99.95
               17 |          3        0.03       99.98
               18 |          2        0.02      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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