67% (1997)

30% (2003)

52% (1998)

50% (2005)

55% (1994)

48% (2010)

56% (2006)

50% (2003)

41% (2002)

43% (2007)

56% (1997)

33% (1996)

48% (1994)

25% (1995)

36% (2003)

52% (1996)

66% (2005)

58% (1996)

33% (2004)

49% (1997)