63% (1975)

63% (1998)

55% (1992)

0% (1989)

0% (1994)

52% (1997)

45% (1994)

40% (2000)

45% (2006)

49% (1994)

70% (2004)

40% (2001)

0% (2002)

80% (1990)

66% (1988)

48% (1999)

47% (2015)

64% (1996)

39% (1992)

0% (1993)