cold facts? It's just a convenient distance above the shield

1989 8.400044 0.119047 3.8744% 1988 0.731574 1.366917 3.3218% 1987 15.447808 0.064734 3.1640% 1986 7.794718 0.128292 2.6144% 1985 0.549747 1.819018 2.9715% 1984 5.551425 0.180134 3.6576% 1983 3.697473 0.270455 3.8998% 1982 13.699008 0.072998 6.3831% 1981 2.021499 0.494683 9.6843% 1980 0.424828 2.353895 9.0330% 1979 10.767481 0.092872 8.8650% 1978 5.729988 0.174520 7.2813% 1977 5.299227 0.188707 6.6558% 1976 0.351850 2.842116 6.4073% 1975 1.900646 0.526137 9.8159% 1974 1.504182 0.664813 9.0909% 1973 0.335815 2.977832 6.4509% 1972 2.104078 0.475268 4.7304% 1971 3.964404 0.252245 5.7132% 1970 5.526494 0.180947 5.5272% 1969 2.601331 0.384419 5.5714% 1968 2.530270 0.395215 5.0148% 1967 4.378048 0.228412 2.5719% 1966 1.489346 0.671436 3.5485% 1965 0.238479 4.193248 2.7360% 1964 2.150327 0.465046 1.5423% 1963 0.187894 5.322148 1.5697% 1962 4.430266 0.225720 2.2421% 1961 0.117531 8.508396 0.9709% 1960 0.209631 4.770281 1.6442% 1959 3.200149 0.312485 2.3579% 1958 4.949895 0.202024 2.0623% 1957 0.370224 2.701066 3.5571% 1956 0.214440 4.663301 3.3098% 1955 0.804728 1.242657 3.4226% 1954 0.531312 1.882134 1.5421%

moat