Frequencies for first 10,000 rows of othproc3 variable in nhamcsopd2008 dataset :

procedure 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,975       99.75       99.75
       2131 |          1        0.01       99.76
       215- |          1        0.01       99.77
       286- |          1        0.01       99.78
       3958 |          1        0.01       99.79
       5451 |          1        0.01       99.80
       8286 |          1        0.01       99.81
       8314 |          1        0.01       99.82
       8363 |          1        0.01       99.83
       8628 |          2        0.02       99.85
       8761 |          2        0.02       99.87
       8913 |          1        0.01       99.88
       8917 |          1        0.01       99.89
       8938 |          1        0.01       99.90
       8959 |          3        0.03       99.93
       9039 |          1        0.01       99.94
       9092 |          1        0.01       99.95
       9359 |          2        0.02       99.97
       9929 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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