55% (1972)

0% (1986)

49% (1995)

0% (1987)

62% (1970)

72% (1994)

73% (1980)

51% (1975)

59% (1971)

73% (2008)

60% (1991)

53% (1981)

38% (1998)

50% (1978)

53% (1993)

58% (1998)

42% (1971)

0% (1972)

58% (2008)

39% (2003)