Table Bl. (Continued) 



Nesting 

 Pairs 



2 

 2 

 2 

 2 

 2 

 2 



present 



2,274 

 1,800 

 1,200 

 900 

 800 

 750 

 579 

 540 

 500 

 500 

 500 

 500 

 500 

 450 

 400 

 385 

 380 

 380 

 356 



B-15 



