71% (1990)

71% (1992)

70% (2011)

76% (1997)

71% (1999)

67% (1994)

76% (2002)

69% (1990)

70% (1996)

65% (2008)

51% (2017)

66% (2001)

46% (1989)

66% (1991)

51% (2013)

68% (2003)

44% (2002)

60% (2007)

60% (2011)

59% (2004)