68% (2005)

55% (1991)

0% (2002)

60% (1990)

63% (2009)

60% (2004)

55% (1999)

70% (2005)

50% (1998)

31% (2006)

17% (2003)

69% (1993)

0% (1990)

45% (1999)

60% (1992)

47% (1993)

10% (1991)

48% (1996)

35% (1993)

70% (1998)