59% (1997)

59% (2010)

55% (2002)

46% (2001)

66% (2000)

61% (2000)

50% (2008)

52% (2009)

65% (2006)

58% (1999)

41% (2000)

62% (1986)

56% (2006)

48% (2007)

63% (2007)

61% (2000)

28% (2001)

35% (2010)

66% (2007)

52% (2004)