Frequencies for first 10,000 rows of febrile variable in natl1998 dataset :

    Febrile |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        146        1.46        1.46
          2 |      9,853       98.53       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015