49% (2003)

64% (2000)

54% (1997)

56% (2011)

47% (2000)

51% (1998)

46% (2004)

56% (2003)

35% (1998)

20% (1998)

30% (1998)

41% (2000)

37% (2004)

35% (2000)

35% (2001)