Year	% change from 1990
1991	-4.62898114434077
1992	-6.61902127017415
1993	-12.3647155786517
1994	-9.15271420113992
1995	-13.0995174839516
1996	-8.62956929541822
1997	-13.0674013395915
1998	-13.713206700279
1999	-17.6402759666766
2000	-17.6712312865418
2001	-22.8837202103414
2002	-24.9701087692552
2003	-24.2948958546957
2004	-26.2284425217751
2005	-26.2145126278358
2006	-28.4607080255536
2007	-28.7919299481111
2008	-30.7773267759647
2009	-35.2820996993465
2010	-36.1182802772049
2011	-39.1050272775059
2012	-42.0917742778069