52% (1999)

57% (1996)

45% (1993)

46% (2003)

61% (2009)

52% (2001)

65% (2007)

51% (2011)

55% (2001)

53% (2008)

48% (2002)

48% (2009)

42% (1998)

43% (1996)

53% (2005)

57% (2012)

40% (2009)

56% (2005)

45% (2000)

52% (2013)