68% (1993)

42% (1983)

46% (2010)

64% (2001)

70% (1992)

56% (2004)

10% (1990)

56% (2004)

70% (1990)

38% (2001)

60% (1983)

50% (1985)

59% (1987)

48% (2009)

61% (2008)

62% (2006)

56% (1982)

68% (1992)

56% (2011)

64% (1999)