71% (2015)

52% (2010)

40% (1998)

61% (2004)

60% (1997)

44% (1995)

53% (2000)

67% (2001)

33% (2002)

47% (2013)

63% (2005)

48% (1994)

55% (1997)

69% (2009)

45% (2002)

20% (2000)