3.8998% 1982 0.458314 2.181908 6.3831% 1981 1.898996 0.526594 9.6843% 1980 0.628849 1.590207 9.0330% 1979 0.296089 3.377367 8.8650% 1978 2.876529 0.347641 7.2813% 1977 2.265988 0.441309 6.6558% 1976 4.891608 0.204432 6.4073% 1975 4.034063 0.247889 9.8159% 1974 1.985288 0.503705 9.0909% 1973 3.367356 0.296969 6.4509% 1972 1.457701 0.686012 4.7304% 1971 5.999898 0.166670 5.7132% 1970 2.876810 0.347607 5.5272% 1969 0.383066 2.610519 5.5714% 1968 0.194359 5.145114 5.0148% 1967 5.279406 0.189415 2.5719% 1966 4.023043 0.248568 3.5485% 1965 2.541386 0.393486 2.7360% 1964 2.238116 0.446804 1.5423% 1963 4.101343 0.243823 1.5697% 1962 0.216412 4.620807 2.2421% 1961 3.949408 0.253202 0.9709% 1960 4.175631 0.239485 1.6442% 1959 3.753278 0.266434 2.3579% 1958 1.953976 0.511777 2.0623% 1957 3.637367 0.274924 3.5571% 1956 2.178378 0.459057 3.3098% 1955 0.839496 1.191191 3.4226% 1954 0.364264 2.745263 1.5421% 1953 3.597085
copper