61% (2003)

52% (2013)

56% (2002)

63% (2004)

56% (1997)

62% (2001)

64% (2004)

61% (2000)

63% (1997)

53% (1998)

66% (2001)

51% (2005)

59% (2010)

58% (1998)

63% (1996)

54% (1996)

52% (1998)

57% (1998)

65% (2000)

52% (1999)