68% (1951)

70% (1999)

66% (2006)

70% (2003)

64% (1978)

60% (2001)

54% (1969)

63% (1978)

53% (2017)

70% (1953)

57% (1995)

72% (1981)

77% (1954)

63% (1974)

35% (2007)

45% (1992)

62% (1983)

56% (1993)

64% (2014)

70% (2023)