1956.0 1960.0 1961.0 1963.0 1974.0 1980.0 1981.0 1983.0 1956.0 1960.0 1961.0 1964.0 1966.0 1966.0 1980.0 1983.0 1960.0 1961.0 1963.0 1964.0 1964.0 1966.0 1969.0 1971.0 1973.0 1974.0 1975.0 1980.0 1981.0 1983.0 1987.0 1988.0 1989.0 1990.0 1991.0 1994.0 1998.0 2000.0 2000.0 1972.0 1976.0 1988.0 1998.0 1999.0 2000.0 1998.0 2000.0 1979.0 1986.0 