Frequencies for first 10,000 rows of totproc variable in nhamcsed2008 dataset :

             total number of procedures |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
'none' box and all item fields are blan |        415        4.15        4.15
                                      0 |      4,826       48.26       52.41
                                      1 |      3,941       39.41       91.82
                                      2 |        689        6.89       98.71
                                      3 |        111        1.11       99.82
                                      4 |         13        0.13       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