Year	% change from 1990
1991	-3.4560481211362
1992	-9.31317107054708
1993	-12.3065299587378
1994	-16.7234769386727
1995	-17.3288594215567
1996	-16.1596161417846
1997	-19.8088555441794
1998	-12.9831459865932
1999	-22.3322420205392
2000	-19.2923454197904
2001	-20.3218373538698
2002	-16.8420524179016
2003	-11.0177815295388
2004	-20.4749921391298
2005	-19.7543800493002
2006	-17.1816654726535
2007	-18.4951871885144
2008	-15.56285634585
2009	-22.9461383865271
2010	-20.8027844712197
2011	-19.9384895283469
2012	-19.7162365648859