71% (2014)

52% (2010)

39% (1998)

53% (2000)

47% (2013)

61% (2004)

33% (2002)

45% (1995)

60% (1997)

20% (2000)

67% (2001)

63% (2005)

69% (2009)

48% (1994)

45% (2002)

55% (1997)