Frequencies for first 10,000 rows of totdiag variable in nhamcsed2003 dataset :

    total number of diagnostic services |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                      0 |      1,041       10.41       10.41
                                      1 |      2,671       26.71       37.12
                                      2 |      2,032       20.32       57.44
                                      3 |      1,065       10.65       68.09
                                      4 |        639        6.39       74.48
                                      5 |        472        4.72       79.20
                                      6 |        378        3.78       82.98
                                      7 |        323        3.23       86.21
                                      8 |        292        2.92       89.13
                                      9 |        265        2.65       91.78
                                     10 |        263        2.63       94.41
                                     11 |        197        1.97       96.38
                                     12 |        139        1.39       97.77
                                     13 |         74        0.74       98.51
                                     14 |         23        0.23       98.74
                                     15 |          9        0.09       98.83
                                     16 |          4        0.04       98.87
                                     17 |          1        0.01       98.88
                                     18 |          1        0.01       98.89
'none' box and all item fields are blan |        111        1.11      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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