100 r 



80 



a> 



60 



> 





o 





JO 





<3 







40 



« 20 



Q> 



o 



> -20 



■40 - 



-60 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 

 Profile Line 5 



100 r 



-60 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 

 Profile Line 6 



139 



