68% (2005)

63% (2009)

51% (1993)

50% (1998)

60% (2004)

64% (2007)

30% (2003)

55% (1991)

63% (2004)

49% (1992)

55% (1999)

40% (2002)

49% (2002)

70% (2005)

60% (1992)

10% (1991)

45% (1999)

48% (1996)

60% (1990)

0% (1990)