Frequencies for first 10,000 rows of scpwi13d variable in nhamcsopd2007 dataset :

scope write |
  in #1 - 3 |
      digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,752       97.52       97.52
        181 |          1        0.01       97.53
        291 |          1        0.01       97.54
        314 |          3        0.03       97.57
        332 |          5        0.05       97.62
        342 |          2        0.02       97.64
        422 |          1        0.01       97.65
        431 |          1        0.01       97.66
        441 |          7        0.07       97.73
        449 |          8        0.08       97.81
        451 |         23        0.23       98.04
        452 |        106        1.06       99.10
        454 |          3        0.03       99.13
        482 |          3        0.03       99.16
        492 |          2        0.02       99.18
        512 |          4        0.04       99.22
        542 |          7        0.07       99.29
        573 |         18        0.18       99.47
        681 |          6        0.06       99.53
        702 |         21        0.21       99.74
        802 |         19        0.19       99.93
        999 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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