66% (1993)

66% (1996)

71% (2010)

73% (2001)

56% (2001)

90% (2009)

55% (2007)

76% (2008)

50% (2008)

0% (2004)

40% (1995)

71% (2005)

0% (2002)

62% (2009)

68% (2010)

58% (1995)

48% (2007)

45% (2011)

70% (2011)

56% (2015)