65% (1994)

60% (2002)

56% (2006)

76% (2001)

60% (2003)

70% (2004)

70% (1989)

55% (1998)

65% (2004)

68% (1994)

67% (2007)

61% (1991)

58% (2000)

59% (2008)

47% (2006)

61% (1997)

64% (1993)

56% (1997)

63% (2005)

54% (1995)