Frequencies for first 10,000 rows of scpwi23d variable in nhamcsopd2004 dataset :

      scope |
  procedure |
write-in #2 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,981       99.81       99.81
        314 |          1        0.01       99.82
        332 |          3        0.03       99.85
        451 |          4        0.04       99.89
        452 |         10        0.10       99.99
        492 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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