53% (2005)

55% (2006)

59% (2005)

60% (2003)

54% (2003)

64% (2004)

44% (2004)

0% (1999)

49% (2001)

50% (1995)

58% (2002)

43% (2003)

0% (1990)

62% (1988)

0% (2006)

60% (1994)

0% (1990)

50% (2007)

30% (1990)

40% (1995)