82% (1995)

62% (2008)

60% (1999)

56% (2007)

67% (1999)

62% (2002)

53% (2004)

66% (1997)

66% (1997)

73% (2009)

68% (1999)

70% (1993)

68% (2000)

66% (1994)

55% (2002)

65% (2011)

63% (2007)

52% (2006)

51% (1993)

79% (1991)