84% (1999)

78% (1987)

78% (2007)

57% (2006)

68% (1997)

71% (2005)

62% (1993)

64% (2001)

66% (1998)

55% (2008)

59% (1999)

62% (2018)

65% (2010)

58% (2016)

65% (2004)

50% (2000)

60% (2012)