76% (2006)

76% (2004)

72% (2002)

69% (2014)

0% (2025)

65% (2000)

68% (1999)

66% (2012)

62% (2009)

68% (2013)

67% (1997)

63% (2010)

69% (1994)

67% (1990)

59% (2000)

72% (2010)

64% (1997)

59% (1993)

65% (2007)

54% (2004)