69% (1979)

57% (1996)

58% (1972)

71% (1982)

68% (1977)

47% (2008)

51% (2007)

65% (1978)

61% (1975)

60% (1979)

62% (1980)

64% (1973)

61% (1986)

60% (1968)

54% (1976)

72% (1973)

70% (1993)

61% (1972)

67% (1988)

47% (1975)