82% (1995)

62% (2008)

56% (2007)

60% (1999)

61% (2002)

53% (2004)

66% (1997)

70% (1993)

66% (1997)

66% (2011)

68% (1999)

65% (1994)

67% (1999)

52% (2006)

55% (2002)

73% (1992)

73% (2009)

51% (1993)

68% (2000)

63% (2007)