61% (1987)

71% (1993)

80% (2000)

78% (1996)

59% (1979)

72% (2004)

50% (1981)

80% (1973)

56% (1987)

72% (1986)

20% (2000)

100% (2002)

62% (1997)

73% (1989)

62% (1990)

80% (1995)

51% (1984)

66% (2019)

70% (2010)

71% (2003)