Frequencies for first 10,000 rows of uld_febr variable in natl2006 dataset :

Febrile RFP |
711=f_uld_f |
   ebrile U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        145        1.45        1.45
          2 |      9,723       97.23       98.68
          9 |        132        1.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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