Frequencies for first 10,000 rows of scpwi12d variable in namcs2007 dataset :

scope write |
  in #1 - 2 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,873       98.73       98.73
         31 |          5        0.05       98.78
         45 |        103        1.03       99.81
         48 |          1        0.01       99.82
         49 |          1        0.01       99.83
         54 |          2        0.02       99.85
         70 |          4        0.04       99.89
         80 |          2        0.02       99.91
         86 |          1        0.01       99.92
         99 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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