53% (2005)

78% (1999)

55% (2006)

64% (2004)

58% (2005)

60% (2003)

50% (1995)

56% (2002)

62% (1988)

54% (2003)

44% (2004)

49% (2001)

0% (1990)

0% (1990)

30% (1990)

48% (2003)

60% (1994)

40% (1995)

0% (1999)

0% (2006)