40% (1987)

60% (2012)

76% (1995)

63% (2005)

60% (1988)

57% (1988)

52% (2008)

73% (1983)

33% (1984)

63% (2011)

60% (2006)

40% (1989)

54% (1998)

68% (2000)

62% (1994)

42% (1990)

48% (1992)

45% (1992)

70% (1988)

43% (2008)