59% (2015)

46% (2006)

64% (2002)

53% (2000)

60% (2007)

48% (2001)

62% (2005)

46% (2000)

58% (2011)

67% (1998)

53% (2010)

58% (2002)

70% (1995)

47% (2009)

65% (2012)

62% (2000)

53% (2005)

68% (1995)

35% (1997)

58% (1997)