71% (1977)

60% (1981)

0% (2003)

58% (2008)

61% (2000)

50% (1985)

57% (1983)

43% (2007)

85% (1985)

51% (2003)

60% (2002)

70% (1995)

35% (1988)

55% (1976)

32% (1990)

55% (1977)

50% (1992)

60% (1998)

59% (2008)

70% (2000)