67% (1996)

57% (1995)

58% (1995)

59% (1996)

52% (2000)

62% (2002)

52% (2002)

59% (2008)

66% (2006)

76% (1997)

61% (1994)

48% (2001)

57% (1998)

61% (1993)

62% (1996)

60% (2004)

48% (1992)

40% (2002)

53% (1999)

57% (1999)