46% (2015)

62% (2003)

59% (1998)

47% (2015)

62% (2013)

62% (1995)

57% (2014)

59% (2002)

53% (1994)

51% (2004)

27% (1995)

65% (1997)

47% (2001)

59% (2003)

66% (2006)

37% (1998)

32% (1993)

20% (1988)

20% (1999)

0% (1970)