Year	% change from 1990
1991	0.538368822820412
1992	-1.18280433909201
1993	-3.14744877460829
1994	-3.51948573724388
1995	-2.30855765367617
1996	-5.85938127762154
1997	-8.65488147850543
1998	-10.7022900763359
1999	-9.01807955002009
2000	-10.9762957010848
2001	-13.9421454399357
2002	-17.6368019284853
2003	-20.3182000803536
2004	-20.4014463640016
2005	-22.6702290076336
2006	-22.9879469666533
2007	-23.2840498192045
2008	-23.3596625150663
2009	-22.9722780233025
2010	-22.6006428284452
2011	-24.3493373784302
2012	-25.7264047689135