100 

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tt> 60 



> 

 o 



1 40 

 -^201- 



Q> 



E 



O 



> -20 - 

 ^-40 



-60 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 

 Profile Line 7 



100 r 



-60 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 



Profile Line 8 



140 



