68% (2003)

56% (2009)

65% (1999)

35% (2010)

69% (1993)

59% (2005)

47% (2002)

61% (2002)

41% (2012)

62% (1994)

40% (2014)

58% (2015)

75% (1996)

90% (2005)

45% (2008)

70% (1986)

90% (2001)