52% (2013)

51% (2000)

44% (2005)

64% (2009)

56% (2006)

46% (1999)

46% (2004)

37% (2001)

56% (2012)

51% (2000)

55% (2005)

42% (2001)

47% (2001)

52% (2003)

48% (1999)

42% (2002)

62% (2011)

46% (2005)

50% (2004)

58% (1959)