67% (1999)

53% (1986)

65% (1992)

64% (2011)

75% (1983)

45% (1993)

75% (1995)

60% (2008)

62% (1990)

53% (1987)

44% (1992)

60% (1985)

58% (1997)

68% (1988)

62% (1981)

57% (1986)

80% (1981)

64% (1991)

48% (1983)

35% (2006)