52% (2005)

56% (2006)

64% (2004)

54% (2003)

50% (1995)

60% (2003)

0% (1999)

58% (2005)

58% (2002)

49% (2001)

62% (1988)

0% (1990)

50% (2007)

44% (2004)

60% (1994)

0% (1990)

0% (1990)

40% (1995)

0% (2006)

30% (1990)