67% (1991)

60% (2002)

63% (1994)

54% (1995)

59% (2013)

61% (1999)

56% (1996)

61% (1996)

58% (1988)

66% (2002)

50% (1998)

52% (1997)

51% (1993)

50% (2002)

0% (1993)