Frequencies for first 10,000 rows of totproc variable in nhamcsed2004 dataset :

             total number of procedures |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                      0 |      4,472       44.72       44.72
                                      1 |      4,089       40.89       85.61
                                      2 |        727        7.27       92.88
                                      3 |        107        1.07       93.95
                                      4 |         22        0.22       94.17
                                      5 |          9        0.09       94.26
                                      6 |          2        0.02       94.28
'none' box and all item fields are blan |        572        5.72      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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