Frequencies for first 10,000 rows of totproc variable in nhamcsed2001 dataset :

      total |
  number of |
 procedures |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,221       52.21       52.21
          1 |      3,651       36.51       88.72
          2 |        465        4.65       93.37
          3 |         54        0.54       93.91
          4 |          5        0.05       93.96
          5 |          3        0.03       93.99
         99 |        601        6.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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