• 1980 to 1980 1
• 1981 to 1981 0
• 1982 to 1982 0
• 1983 to 1983 0
• 1984 to 1984 0
• 1985 to 1985 1
• 1986 to 1986 0
• 1987 to 1987 1
• 1988 to 1988 0
• 1989 to 1989 0
• 1990 to 1990 0
• 1991 to 1991 0
• 1992 to 1992 0
• 1993 to 1993 1