Frequencies for first 10,000 rows of exmwi13d variable in nhamcsopd2004 dataset :

       exam |
write-in #1 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      7,650       76.50       76.50
        753 |         25        0.25       76.75
        890 |          1        0.01       76.76
        891 |        144        1.44       78.20
        892 |        440        4.40       82.60
        893 |      1,540       15.40       98.00
        897 |          3        0.03       98.03
        940 |          1        0.01       98.04
        941 |         22        0.22       98.26
        950 |        130        1.30       99.56
        954 |          2        0.02       99.58
        999 |         42        0.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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