51% (1998)

65% (1994)

60% (1999)

56% (1982)

0% (1970)

46% (1991)

62% (2002)

48% (1982)

67% (1998)

60% (1993)

0% (1970)

63% (2010)

59% (2015)

52% (1988)

64% (1995)

47% (1983)

53% (1993)

61% (1996)

61% (2001)

67% (1988)