50 



Figure 7. Cumulative Probability of 



Achieving a Given Extinction Level 



Using 1980 - 1990 Data 



100% 



80% 



60% 



40% 



20% 



0% 



] I I I I LJJ.i-Lja.L I J.llJ. 1 I 1 1 I i I I J I.LLl_ia_l.Ll I I.I I I I 1 M I 1 I I 1 I 



1 30 300 1000 5000 



Extinction Level 



