30% (1999)

48% (1998)

48% (1999)

44% (1993)

43% (2008)

43% (1994)

39% (1996)

52% (2001)

64% (1995)

39% (2007)

35% (1997)

56% (1997)

32% (1998)

29% (2000)

50% (1997)

48% (2009)

45% (1999)

52% (1999)

68% (2010)

60% (1996)