59% (2009)

64% (1992)

63% (2008)

70% (2010)

63% (2011)

64% (2007)

62% (2001)

63% (2006)

59% (2011)

70% (1987)

59% (1999)

66% (2001)

46% (2005)

56% (2007)

100% (2009)

69% (1989)

64% (2002)

65% (1988)

39% (2007)

58% (2010)