Year	% change from 1990
1991	-12.2868677534473
1992	-17.9765519756235
1993	-22.4669037013585
1994	-25.2732258045258
1995	-25.5149627082511
1996	-24.0777777600338
1997	-24.0474881682043
1998	-26.6201591719711
1999	-27.6224252701814
2000	-30.224616448149
2001	-30.725183449436
2002	-31.3789118309698
2003	-31.7264864194426
2004	-33.0808818924262
2005	-32.248645686589
2006	-33.0391890331551
2007	-33.3795068786365
2008	-31.9688281702537
2009	-35.3428226043087
2010	-30.8447407638409
2011	-32.8119202452572
2012	-35.9262294511584