76% (1999)

77% (1965)

72% (1972)

30% (2003)

40% (1989)

72% (2009)

64% (1994)

53% (2005)

73% (1992)

46% (1996)

66% (1993)

38% (1987)

54% (1960)

60% (1982)

73% (2000)

61% (2004)

49% (1973)

52% (2002)

57% (1993)

55% (2006)