Frequencies for first 10,000 rows of scpwi12d variable in namcs2008 dataset :

scope write |
  in #1 - 2 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,845       98.45       98.45
         31 |          1        0.01       98.46
         33 |          1        0.01       98.47
         44 |          1        0.01       98.48
         45 |        120        1.20       99.68
         48 |          7        0.07       99.75
         49 |          1        0.01       99.76
         57 |          2        0.02       99.78
         70 |          2        0.02       99.80
         80 |          5        0.05       99.85
         99 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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