Frequencies for first 10,000 rows of amb22 variable in namcs1995 dataset :

 ambulatory |
   surgical |
proc #2 - 2 |
        dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,987       99.87       99.87
         42 |          1        0.01       99.88
         49 |          1        0.01       99.89
         68 |          1        0.01       99.90
         70 |          3        0.03       99.93
         93 |          6        0.06       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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