Year	% change from 1990
1991	-1.06199737637597
1992	-2.05422156314757
1993	-2.99245232799102
1994	-3.7789691819236
1995	-4.15796878267648
1996	-4.49238578680203
1997	-4.76187760223578
1998	-96.2622863552539
1999	-93.3840015969885
2000	-91.2878571835967
2001	-91.0416547843114
2002	-91.2752220669595
2003	-89.9126856023878
2004	-89.9246009429837
2005	-89.0427815167589
2006	-88.5013555390787
2007	-87.8769567862507
2008	-87.465250480047
2009	-88.9408543888667
2010	-87.7459647521816
2011	-87.7459647521821
2012	-87.7459647521816