63% (1995)

70% (1996)

67% (2002)

63% (1993)

61% (1997)

60% (1995)

66% (1996)

72% (2008)

58% (1998)

55% (2003)

71% (1994)

67% (1996)

65% (1995)

64% (2001)

57% (2000)

47% (1994)

69% (2009)

56% (2001)

63% (1998)

62% (1981)