24% (2000)

52% (2009)

24% (1995)

43% (2007)

64% (2006)

50% (1993)

51% (1996)

39% (2001)

42% (1995)

39% (1999)

47% (2002)

60% (1997)

52% (1999)

42% (1998)

44% (1992)

25% (1995)

30% (1997)

52% (2000)

50% (1996)

48% (2001)