57% (2008)

58% (2005)

62% (2006)

56% (2007)

47% (1997)

56% (1998)

56% (1996)

52% (2000)

44% (2004)

80% (1998)

43% (1999)

51% (2004)

37% (1998)

28% (2001)

65% (1998)

40% (2005)

67% (1997)

72% (1996)

35% (2004)

40% (2002)