54% (2004)

64% (2006)

60% (2008)

60% (2011)

56% (2005)

72% (2006)

48% (2007)

64% (2001)

45% (2001)

39% (2004)

62% (2004)

62% (2009)

60% (2006)

30% (2008)

55% (1997)

57% (2007)

53% (2003)

72% (1995)

40% (2007)

70% (2002)