37% (1998)

59% (2007)

51% (2013)

46% (2004)

51% (2000)

46% (2004)

47% (2001)

54% (2002)

46% (2005)

43% (2001)

37% (2001)

46% (2005)

52% (2003)

47% (2001)

42% (2002)

46% (1999)

35% (2003)

64% (2009)

42% (2003)

54% (2002)