Frequencies for first 10,000 rows of totproc variable in nhamcsed2012 dataset :

    Total number of procedures provided |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
'None' box and all item fields are blan |        319        3.19        3.19
                                      0 |      5,121       51.21       54.40
                                      1 |      3,717       37.17       91.57
                                      2 |        690        6.90       98.47
                                      3 |        130        1.30       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 , 7 Nov 2016