68% (1987)

59% (2016)

62% (2008)

61% (1998)

60% (2004)

38% (1970)

56% (2005)

59% (2007)

61% (1967)

64% (1987)

64% (2007)

66% (1985)

46% (1994)

71% (1998)

57% (1988)

60% (2009)

36% (2005)

66% (1980)

64% (2016)

64% (2002)