47% (1995)

35% (1993)

44% (2011)

35% (1988)

40% (1996)

53% (1991)

48% (1987)

41% (2004)

49% (1991)

45% (1994)

36% (1995)

58% (1995)

54% (1993)

49% (1990)

22% (1967)

40% (1991)

30% (1993)

48% (1995)

50% (1997)

35% (1995)