70% (1999)

68% (2002)

58% (2003)

53% (1997)

60% (2004)

58% (2003)

55% (1998)

57% (2000)

65% (1999)

70% (2000)

50% (2005)

58% (1995)

61% (2002)

57% (1986)

56% (2008)

66% (1998)

59% (2000)

78% (2010)

62% (2005)

56% (1986)