Year	% change from 1990
1991	-84.3700787401576
1992	-82.8740157480315
1993	-80.3543307086614
1994	-86.8110236220472
1995	-87.7165354330709
1996	-88.2283464566929
1997	-88.3858267716535
1998	-89.0157480314961
1999	-89.8818897637796
2000	-90.708661417323
2001	-91.4173228346457
2002	-92.4015748031496
2003	-92.244094488189
2004	-92.244094488189
2005	-89.015748031496
2006	-87.2440944881891
2007	-87.3622047244094
2008	-87.3622047244095
2009	-87.7165354330709
2010	-87.4015748031495
2011	-87.4015748031496
2012	-87.4015748031495