68% (2005)

63% (2009)

60% (1992)

51% (1993)

49% (2002)

31% (2006)

55% (1991)

49% (1992)

47% (1993)

29% (1990)

55% (1999)

48% (1996)

63% (2004)

60% (2004)

0% (1990)

69% (1993)

64% (2007)

44% (1995)

17% (2003)

53% (1997)