64% (2008)

68% (1999)

65% (2003)

67% (2005)

66% (2005)

68% (2006)

49% (2006)

52% (2012)

54% (1960)

61% (1964)

57% (1996)

60% (1971)

47% (1966)

0% (2001)

55% (1983)

67% (1981)

57% (2000)

20% (1994)

60% (1984)

67% (1974)