55% (1997)

58% (1996)

50% (2005)

51% (2005)

35% (2005)

40% (2007)

60% (2006)

52% (2004)

0% (1992)

45% (2007)

63% (2009)

70% (2002)

53% (2003)

62% (2004)

30% (2006)

0% (2006)

45% (2007)

30% (2008)

60% (1995)

30% (2010)