45% (1999)

64% (1997)

42% (2003)

0% (1996)

61% (1999)

71% (2002)

46% (1998)

69% (1999)

0% (2002)

53% (1996)

67% (1999)

72% (1990)

63% (2002)

45% (2002)

0% (1985)

72% (1987)

56% (1985)

60% (2002)

70% (2006)

52% (2005)