LIB1	LIB2	ALP1	ALP2
1984	41.3		58.7	
1987	42.7	45.8	57.3	54.2
1990		51.4		48.6
1993	51.3	52.4	48.7	47.6
1996	51.4		48.6	
1998	51		49	
2001	53.7		46.3	
2004	55.8		44.2	
2007	50.5		49.5	
2010	49.1		50.9