LIB1	LIB2	ALP1	ALP2
1984	42		58	
1987	45.7	47	54.3	53
1990		54.4		45.6
1993	49.5	49.6	50.5	50.4
1996	52.1		47.9	
1998	49.4		50.6	
2001	47.5	47.2	52.5	52.8
2004		45		55
2007		45.2		54.8
2010		45.6		54.4