Year	% change from 1990
1991	-1.57293859388627
1992	-4.08317776410773
1993	-6.45249388906981
1994	-7.87294436013908
1995	-8.49314072929306
1996	-5.42457764233955
1997	-6.44456236507769
1998	-7.83636911529855
1999	-9.17240352837671
2000	-10.1825217497916
2001	-11.6800690057092
2002	-13.4248091067504
2003	-14.6054982263811
2004	-15.9723579174697
2005	-16.9072942283677
2006	-17.9063680144685
2007	-18.3124944112389
2008	-19.1889518596267
2009	-19.0888653861921
2010	-19.319489033661
2011	-20.1953751862693
2012	-21.418982083682