450 r 



350 



250 



— 150 



c 

 o 



to 



Q 



50 

 -50 



- 



-150 



_ 



■250 



350 



X Extrapolgted Ootum 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 



Profile Line 13 



450 r- 



350 



250 



— 150 



o 50 



B -50 



- 150 - 



-250 - 



-350 



1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 



Profile Line 14 



132 



