Frequencies for first 10,000 rows of scpwi13d variable in nhamcsopd2002 dataset :

      scope |
  procedure |
write-in #1 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,858       98.58       98.58
        181 |          1        0.01       98.59
        221 |          4        0.04       98.63
        314 |          6        0.06       98.69
        332 |          2        0.02       98.71
        441 |          2        0.02       98.73
        451 |         11        0.11       98.84
        452 |         45        0.45       99.29
        454 |          2        0.02       99.31
        482 |          7        0.07       99.38
        492 |          1        0.01       99.39
        542 |          1        0.01       99.40
        573 |         19        0.19       99.59
        681 |          9        0.09       99.68
        682 |          1        0.01       99.69
        702 |         24        0.24       99.93
        951 |          1        0.01       99.94
        999 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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