50% (1999)

50% (2001)

61% (1983)

59% (1999)

68% (1986)

50% (2000)

53% (1985)

59% (1995)

53% (1994)

60% (2006)

60% (1991)

53% (1995)

65% (2002)

60% (2002)

42% (1994)

0% (1981)

62% (2005)

0% (1993)

71% (2008)

0% (1986)