50% (1976)

57% (2000)

46% (2004)

40% (2004)

55% (1998)

52% (1991)

72% (2003)

0% (2008)

58% (1999)

0% (1999)

50% (2004)

51% (1996)

43% (1984)

48% (1995)

80% (2015)

100% (1988)

50% (2003)

40% (1991)

59% (1996)

30% (1993)