55% (2001)

56% (2005)

51% (1997)

46% (2000)

64% (1999)

64% (1997)

49% (1996)

57% (1995)

60% (2009)

43% (1975)

46% (2001)

44% (1997)

58% (1999)

44% (1993)

32% (2000)

38% (2001)

60% (1997)

61% (2000)

42% (2018)

34% (1996)