100 r 



80 



CO 



<u 60 



> 

 o 



40 - 



ro 20 - 



> -20 - 



■40 



■60 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 

 Profile Line 3 



100 r 



80 



to 



?> 50 



^ 40 

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<U 



1-20 



-40 



60 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 

 Profile Line 4 



138 



