Frequencies for first 10,000 rows of febrile variable in natlterr2002 dataset :

    Febrile |
      (>100 |
 degrees F. |
      or 38 |
degrees C.) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         22        0.22        0.22
          2 |      9,956       99.56       99.78
          8 |         14        0.14       99.92
          9 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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