LIB1	LIB2	ALP1	ALP2
1984	43.6		56.4	
1987	44.9		55.1	
1990	44.7	49.0	55.3	51.0
1993		51.6		48.4
1996		58.1		41.9
1998		51.2		48.8
2001	51.0	51.9	49.0	48.1
2004	49.9		50.1	
2007	44.9		55.1	
2010	44.3		55.7