60% (1991)

50% (1999)

68% (1986)

59% (1999)

71% (2008)

50% (2001)

53% (1994)

50% (2000)

61% (1983)

53% (1985)

48% (1995)

0% (1981)

53% (2011)

60% (2006)

59% (1995)

48% (1995)

65% (2002)

60% (2003)

0% (1990)

63% (1993)