Frequencies for first 10,000 rows of amb22 variable in nhamcsopd1996 dataset :

 ambulatory |
   surgical |
proc #2 - 2 |
        dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,922       99.22       99.22
         13 |         17        0.17       99.39
         14 |          1        0.01       99.40
         22 |          2        0.02       99.42
         23 |          1        0.01       99.43
         28 |          1        0.01       99.44
         32 |          1        0.01       99.45
         38 |          3        0.03       99.48
         39 |          1        0.01       99.49
         42 |          5        0.05       99.54
         44 |          3        0.03       99.57
         45 |         10        0.10       99.67
         49 |          2        0.02       99.69
         51 |          1        0.01       99.70
         54 |          2        0.02       99.72
         57 |          1        0.01       99.73
         59 |          1        0.01       99.74
         63 |          1        0.01       99.75
         66 |          2        0.02       99.77
         67 |          1        0.01       99.78
         78 |          1        0.01       99.79
         79 |          1        0.01       99.80
         80 |          2        0.02       99.82
         85 |          1        0.01       99.83
         86 |          9        0.09       99.92
         93 |          4        0.04       99.96
         96 |          1        0.01       99.97
         97 |          1        0.01       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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