67% (1991)

55% (1995)

63% (1994)

61% (2002)

61% (1999)

59% (2013)

61% (1996)

55% (1996)

46% (1991)

52% (1997)

58% (1988)

52% (1993)

51% (1998)

66% (2002)

30% (2002)

0% (1993)