4.0 



/-- 



30- 



J_ 



_L 



X 



_L 



J_ 



_L 



J_ 



J_ 



_L 



I I I I 



_L 



_L 



_L 



lAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NO' 



1969 1970 1971 



