Year	% change from 1990
1991	-7.51010125446634
1992	-18.182507136689
1993	-18.7535919216207
1994	-19.4809950032926
1995	-20.6359423422773
1996	-17.2612325457622
1997	-19.2631640237067
1998	-20.1568246920829
1999	-19.8603722477311
2000	-22.6239614897618
2001	-22.1246257389887
2002	-23.5056149402618
2003	-21.078973173758
2004	-22.1586809282903
2005	-22.5607152741957
2006	-22.97395197691
2007	-25.8538320596226
2008	-26.6251082496927
2009	-32.5365187923927
2010	-32.0868754013234
2011	-33.9994611609901
2012	-35.431108707449