Frequencies for first 10,000 rows of totproc variable in nhamcsed2007 dataset :

             total number of procedures |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
'none' box and all item fields are blan |        447        4.47        4.47
                                      0 |      4,921       49.21       53.68
                                      1 |      3,887       38.87       92.55
                                      2 |        635        6.35       98.90
                                      3 |         87        0.87       99.77
                                      4 |         18        0.18       99.95
                                      5 |          4        0.04       99.99
                                      6 |          1        0.01      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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