Frequencies for first 10,000 rows of scpwi13d variable in namcs2007 dataset :

scope write |
  in #1 - 3 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,873       98.73       98.73
        314 |          5        0.05       98.78
        451 |         15        0.15       98.93
        452 |         88        0.88       99.81
        482 |          1        0.01       99.82
        492 |          1        0.01       99.83
        542 |          2        0.02       99.85
        702 |          4        0.04       99.89
        802 |          2        0.02       99.91
        863 |          1        0.01       99.92
        999 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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