Frequencies for first 10,000 rows of diagsc2 variable in namcs2007 dataset :

 diagnostic |
 service #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,634       96.34       96.34
       7534 |          3        0.03       96.37
       863- |          1        0.01       96.38
       8744 |          1        0.01       96.39
       8763 |          1        0.01       96.40
       8871 |          2        0.02       96.42
       8877 |          1        0.01       96.43
       8909 |          1        0.01       96.44
       8913 |          7        0.07       96.51
       8915 |          4        0.04       96.55
       8938 |          1        0.01       96.56
       8939 |         60        0.60       97.16
       8959 |         11        0.11       97.27
       897- |          1        0.01       97.28
       9032 |          3        0.03       97.31
       9039 |         10        0.10       97.41
       9049 |          1        0.01       97.42
       9059 |          2        0.02       97.44
       9092 |          1        0.01       97.45
       9099 |          1        0.01       97.46
       9132 |          2        0.02       97.48
       9135 |          2        0.02       97.50
       9141 |          1        0.01       97.51
       9142 |          3        0.03       97.54
       9149 |          1        0.01       97.55
       9192 |          1        0.01       97.56
       9199 |          1        0.01       97.57
       9308 |          2        0.02       97.59
       9504 |          1        0.01       97.60
       9509 |        220        2.20       99.80
       9547 |         10        0.10       99.90
       9929 |          1        0.01       99.91
       9959 |          1        0.01       99.92
       9999 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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