Using the scheme outlined in http://home.att.net/~d.c.hendershot/...s/riskland.pdf, you should add up the frequencies of any outcome for which the equivalent fatalities are greater than or equal to a given value of N. Then plot the frequency sums as the ordinate against N as the abscissa. In the small data set you gave in the attached Excel file, you would get the following:

N F log F

0.1 12.31737 1.090517987

1 12.21406 1.086860049

10 12.20203 1.086432088

The third column is the base-10 logs of the frequency sums. I usually see F-N curves with a line connecting the points, but there are many ways one might display the information. The attached Excel file displays an F-N curve based on your data, with the frequency sums expressed in logs.