LIB1	LIB2	ALP1	ALP2
1984	50.6		49.4	
1987	51.2	50.3	48.8	49.7
1990		58.2		41.8
1993	54.2	56	45.8	44
1996	56.7		43.3	
1998	54.9		45.1	
2001	57.2		42.8	
2004	61.4		38.6	
2007	55.9		44.1	
2010	54.2		45.8