45% (1995)

52% (1996)

54% (1999)

57% (1995)

33% (2004)

47% (2001)

36% (1997)

44% (1994)

56% (2001)

66% (2005)

54% (1999)

55% (1997)

56% (2006)

58% (1996)

56% (1998)

36% (2002)

40% (1994)

43% (2008)

42% (1998)

41% (1992)