46% (2007)

39% (1993)

53% (2009)

30% (2001)

36% (2009)

58% (2014)

60% (2008)

29% (2003)

63% (1998)

55% (2009)

37% (1995)

38% (1994)

53% (2001)

28% (1979)

49% (1990)

52% (2006)

28% (1999)

47% (1997)

50% (2000)

45% (2005)