72% (2011)

61% (1991)

57% (1997)

65% (2008)

66% (2006)

64% (2015)

63% (1997)

56% (1990)

61% (2002)

59% (2018)

65% (2010)

66% (2001)

53% (1993)

71% (2003)

62% (1993)

76% (1995)

51% (1993)

61% (1998)

52% (1985)

72% (2003)