98 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1961 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1962 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1963 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1964 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1965 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1966 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1967 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1968 1000 1000 1000 1000 1000 1000 146 129 103 53 26 -32 1969 -56 -24 14 26 119 120 127 140 111 49 37 -15 1970 25 -27 -6 54 69 125 143 145 104 52 27 -21 1971 -11 -40 -17 41 98 126 130 149 88 46 4 -9 1972 -45 -31 7 58 94 136 137 129 85 28 21 -28 1973 -40 -27 -33 30 106 121 145 130 113 67 -6 -21 1974 -50 -18 5 20 71 114 143 141 107 57 5 -27 1975 -34 -53 13 51 97 120 136 121 110 50 -6 -25 1976 -26 -41 -21 38 85 109 126 101 82 66 18 -38 1977 -44 11 22 47 95 124 146 144 88 54 31 -44 1978 -53 -15 7 32 78 131 141 126 84 45 -2 -13 1979 -41 -30 11 24 87 137 135 133 102 44 19 -8 1980 -65 -47 -16 20 66 123 1000 1000 1000 65 22 -18 1981 -69 -48 23 41 83 147 1000 1000 1000 1000 1000 1000 1982 1000 1000 1000 1000 84 142 133 138 117 64 9 -12 1983 -31 -67 2 56 96 105 142 124 99 46 -10 -20 1984 -30 -29 -19 14 83 112 129 113 103 80 11 -34 1985 -41 -65 9 56 107 115 149 156 94 29 19 -8 1986 -28 -46 1 59 94 123 134 151 114 48 -4 -42 1987 -35 -19 1000 31 75 1000 163 1000 1000 1000 8 -16 1988 -16 -31 -13 30 90 127 166 153 105 52 -35 -34 1989 -38 -18 25 72 76 107 134 137 101 45 5 -33 1990 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000