100 r 

 _, 80 



CO 



<u 60 - 



> 

 o 



^ 40- 



•o 20 - 



> -20 



•40 



-60 



J I I I L 



' ' ' ' ' 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 

 Profile Line 15 



100 r 



80 - 



«J 60 

 o 



-^ 40 



ro 



20 



T3 





>^ 











a> 



n 



fc 





3 





o 





> 



-20 



-40 



60 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 



Profile Line I 6 



144 



