51% (1992)

45% (1994)

55% (1995)

50% (1994)

44% (1993)

49% (1992)

55% (1993)

36% (1992)

40% (1994)

42% (1992)

45% (1991)

42% (1992)

50% (1994)

34% (1994)

30% (1992)

34% (1994)

36% (1993)

23% (1996)

35% (2008)