Frequencies for first 10,000 rows of proc63d variable in nhamcsopd2011 dataset :

 Proc 6 - 3 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,992       99.92       99.92
        535 |          1        0.01       99.93
        542 |          1        0.01       99.94
        652 |          1        0.01       99.95
        863 |          1        0.01       99.96
        893 |          3        0.03       99.99
        995 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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