69% (2001)

49% (2000)

63% (1996)

52% (2003)

63% (2006)

60% (1982)

64% (1999)

69% (1984)

60% (1997)

50% (2000)

67% (1988)

39% (1987)

77% (1987)

60% (1993)

65% (1997)

60% (1985)