73% (1991)

70% (2012)

44% (1992)

65% (1999)

68% (1994)

68% (1994)

53% (2007)

48% (1999)

47% (2014)

63% (1998)

59% (2003)

51% (1996)

69% (1996)

40% (2011)

63% (2003)

71% (1995)

55% (1994)

65% (1992)

59% (2002)

65% (1996)