Year	% change from 1990
1991	0.60239518443761
1992	2.6714134467442
1993	-2.47751327908726
1994	-0.761654254856492
1995	-1.67431969983712
1996	-1.75080004438858
1997	8.13975808217289
1998	0.190750976998921
1999	-2.47796316346698
2000	-2.81522648679288
2001	-1.15095420476936
2002	1.81993227740471
2003	2.45037025484451
2004	6.29493220242399
2005	9.11060857359658
2006	14.2397403867206
2007	15.4319339929638
2008	14.6180931500604
2009	16.5938353843063
2010	17.2067278709372
2011	18.8753587005444
2012	20.1801121364476