Frequencies for first 10,000 rows of febrile variable in natl1994 dataset :

    Febrile |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        124        1.24        1.24
          2 |      9,837       98.37       99.61
          9 |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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