Frequencies for first 10,000 rows of totproc variable in nhamcsed2003 dataset :

             total number of procedures |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                      0 |      5,041       50.41       50.41
                                      1 |      3,744       37.44       87.85
                                      2 |        598        5.98       93.83
                                      3 |         87        0.87       94.70
                                      4 |         14        0.14       94.84
                                      5 |          3        0.03       94.87
                                      6 |          2        0.02       94.89
'none' box and all item fields are blan |        511        5.11      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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