73% (1991)

70% (2012)

58% (2009)

50% (1999)

64% (2003)

69% (1994)

67% (1999)

59% (2003)

53% (2007)

60% (2008)

63% (1998)

0% (1989)

57% (2006)

59% (1992)

42% (2001)

71% (1995)

68% (1994)

47% (2014)

55% (1994)

68% (1989)