Frequencies for first 10,000 rows of exmwi13d variable in nhamcsopd2002 dataset :

       exam |
write-in #1 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      6,983       69.83       69.83
        753 |         23        0.23       70.06
        890 |         41        0.41       70.47
        891 |        405        4.05       74.52
        892 |        524        5.24       79.76
        893 |      1,380       13.80       93.56
        894 |          1        0.01       93.57
        895 |          3        0.03       93.60
        940 |         47        0.47       94.07
        941 |         17        0.17       94.24
        950 |        314        3.14       97.38
        954 |        129        1.29       98.67
        999 |        133        1.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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