Frequencies for first 10,000 rows of totdiag variable in nhamcsed2005 dataset :

         total number of tests/services |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                      0 |      2,324       23.24       23.24
                                      1 |      2,310       23.10       46.34
                                      2 |      1,135       11.35       57.69
                                      3 |        657        6.57       64.26
                                      4 |        504        5.04       69.30
                                      5 |        479        4.79       74.09
                                      6 |        461        4.61       78.70
                                      7 |        426        4.26       82.96
                                      8 |        404        4.04       87.00
                                      9 |        347        3.47       90.47
                                     10 |        263        2.63       93.10
                                     11 |        185        1.85       94.95
                                     12 |         92        0.92       95.87
                                     13 |         26        0.26       96.13
                                     14 |         16        0.16       96.29
                                     15 |          7        0.07       96.36
                                     16 |          2        0.02       96.38
'none' box and all item fields are blan |        362        3.62      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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