1 2 3 4 5 � 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 g 21 Y c 22 23 ��� �� �� �� �� �� �� �� �� �� �� ���� � � � � � � �� �� �� �� �� �� �� �� g 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 g g g 39 40 41 42 8 43 44 45 46 1959 0 0 0.1 0.2 0.3 0.4 0.5 0.6 1 2 3 4 5 1960 1961 1962 1963 1964 1965 1966 1967 47 48 ṉ⛁ ⥲タ᩷ 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68