• 1978 to 1978 1
• 1979 to 1979 0
• 1980 to 1980 0
• 1981 to 1981 0
• 1982 to 1982 0
• 1983 to 1983 0
• 1984 to 1984 0
• 1985 to 1985 0
• 1986 to 1986 0
• 1987 to 1987 0
• 1988 to 1988 1
• 1989 to 1989 0
• 1990 to 1990 1