60% (1998)

59% (1995)

69% (2005)

60% (2002)

56% (1989)

60% (1985)

45% (2000)

42% (2008)

40% (1980)

55% (2006)

60% (1981)

0% (2006)

0% (1988)

35% (2004)

50% (2001)

0% (1996)

50% (1985)

0% (1988)

10% (1989)

70% (2000)