60% (2009)

45% (2008)

45% (2008)

58% (2008)

47% (2016)

48% (2010)

46% (2008)

55% (2006)

47% (2013)

62% (1992)

46% (2005)

53% (1988)

56% (2001)

46% (1990)

51% (2016)

50% (2009)

49% (2010)

52% (2006)

40% (1989)

49% (2015)