Frequencies for first 10,000 rows of totproc variable in nhamcsed1997 dataset :

 total # of |
 procedures |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,588       55.88       55.88
          1 |      3,816       38.16       94.04
          2 |        505        5.05       99.09
          3 |         68        0.68       99.77
          4 |         16        0.16       99.93
          5 |          4        0.04       99.97
          6 |          2        0.02       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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