Frequencies for first 10,000 rows of scpwi13d variable in nhamcsopd2001 dataset :

      scope |
  procedure |
write-in #1 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,850       98.50       98.50
        002 |         61        0.61       99.11
        122 |          2        0.02       99.13
        221 |          1        0.01       99.14
        332 |          2        0.02       99.16
        422 |          3        0.03       99.19
        441 |          3        0.03       99.22
        451 |          5        0.05       99.27
        452 |         42        0.42       99.69
        454 |          5        0.05       99.74
        482 |          4        0.04       99.78
        492 |          1        0.01       99.79
        573 |          6        0.06       99.85
        702 |          9        0.09       99.94
        999 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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