57% (1997)

52% (1996)

40% (1984)

47% (2012)

84% (2006)

62% (1987)

60% (1976)

72% (2012)

54% (1994)

73% (1998)

49% (2002)

61% (2010)

44% (1992)

73% (2013)

65% (1992)

69% (1999)

60% (1998)

64% (1989)

90% (2004)

74% (2017)