49 



Figure 10. Cumulative Probability of 



Achieving a Given Extinction Level 



Using 1975 - 1994 Data 



100% 



80% 



60% 



40% 



20% 



0% 



I I I I I I I I I I I I I I 



30 



1_1_I_L 1_1_1_L 1 I.I I I I I I I LI L 1 



300 1000 5000 



Extinction Level 



Figure 11. Cumulative Probability of 

 Achieving a Given Extinction Level 

 Using Weighted 1975 - 1994 Data 



100% 



80% 



60% 



40% 



20% 



0% 



I 



I ' 



Extinction Level 



1000 5000 



