# tritium in rain
#1950	1951	1952	1953	1954	1955	1956	1957	1958	1959	1960	1961	1962	1963	1964	1965	1966	1967	1968	1969	1970	1971	1972	1973	1974	1975	1976	1977	1978	1979	1980	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990
5	5	5	15	180	27	90	78	260	340	90	80	450	1900	1150	405	280	155	140	145	83	175	120	90	93	105	52	58	68	40	31	28	20	22	19	18	23	17	15	14	13