48% (2005)

47% (2004)

70% (1994)

60% (1994)

33% (1992)

69% (2003)

65% (1996)

57% (1997)

62% (2003)

53% (2000)

100% (1993)

35% (1992)

58% (2008)

56% (2006)

0% (1990)

0% (1988)

62% (1996)