100 

 _, 80 



CO 



<u 60 



40 - 



.n 20 - 



O) 



e 



> -20 - 



40 



-60 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 

 Profile Line 1 1 



100 |- 



_, 80 - 



CO 



^ 60 h 

 o 



1 40 



•^ 20 



>-20 - 



-40 - 



-60 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 

 Profile Line 12 



142 



