50% (1992)

60% (1988)

60% (2005)

67% (1981)

33% (2011)

0% (1978)

57% (1995)

0% (1999)

45% (1972)

0% (2002)

78% (1987)

56% (1972)

57% (2010)

70% (1989)

54% (2010)

55% (1971)

68% (2005)

52% (1969)

0% (1993)

72% (1982)