Frequencies for first 10,000 rows of scpwi13d variable in namcs2008 dataset :

scope write |
  in #1 - 3 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,845       98.45       98.45
        314 |          1        0.01       98.46
        332 |          1        0.01       98.47
        446 |          1        0.01       98.48
        451 |         11        0.11       98.59
        452 |        109        1.09       99.68
        482 |          7        0.07       99.75
        492 |          1        0.01       99.76
        573 |          2        0.02       99.78
        702 |          2        0.02       99.80
        802 |          5        0.05       99.85
        999 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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