Frequencies for first 10,000 rows of totdiag variable in nhamcsed2011 dataset :

   Total number of diagnostic/screening |
           services ordered or provided |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
'None' box and all item fields are blan |        209        2.09        2.09
                                      0 |      2,843       28.43       30.52
                                      1 |      2,065       20.65       51.17
                                      2 |        793        7.93       59.10
                                      3 |        499        4.99       64.09
                                      4 |        376        3.76       67.85
                                      5 |        351        3.51       71.36
                                      6 |        482        4.82       76.18
                                      7 |        470        4.70       80.88
                                      8 |        478        4.78       85.66
                                      9 |        398        3.98       89.64
                                     10 |        330        3.30       92.94
                                     11 |        239        2.39       95.33
                                     12 |        173        1.73       97.06
                                     13 |        121        1.21       98.27
                                     14 |         86        0.86       99.13
                                     15 |         50        0.50       99.63
                                     16 |         16        0.16       99.79
                                     17 |         16        0.16       99.95
                                     18 |          4        0.04       99.99
                                     19 |          1        0.01      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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