30.0

 A

 E 22.5 -

 o0

 n 15.0 b


 Sb b b
 7.5-



 0.0 .
 MAY MAY MAY MAY MAY MAY
 1950 1955 1960 965 1970 1975












N 112.5 -



 75.0-









 MAY MAY MAY MAY MAY MAY
 1950 1955 1960 1965 1970 1975