Year	% change from 1990
1991	-4.5729525791973
1992	-7.2527901422717
1993	-19.1412587932461
1994	-18.6138034215833
1995	-20.9809406101607
1996	-26.5677300647703
1997	-27.2656141100817
1998	-34.9051676873182
1999	-37.6646439490387
2000	-32.3549637118882
2001	-32.6543754820604
2002	-33.3813457732016
2003	-33.4812426238953
2004	-35.0113835946139
2005	-34.3930453206457
2006	-35.0120340857347
2007	-37.8209476726357
2008	-39.2207116372862
2009	-39.3001644813263
2010	-39.1557554525095
2011	-39.4156445570438
2012	-39.5310874618402