Year	% change from 1990
1991	-24.5649078741617
1992	43.7904701268807
1993	-39.1336288170042
1994	-20.7096855442718
1995	-17.326374191472
1996	-34.5367821198563
1997	-84.5853725088243
1998	-83.8708769008497
1999	-84.0622124893741
2000	-83.0940953407099
2001	-82.7015941425668
2002	-82.2115098702507
2003	-81.763736667378
2004	-82.7172836958081
2005	-82.8045644880868
2006	-80.7602699232839
2007	-82.2227042003225
2008	-81.4740833767697
2009	-80.3716167761029
2010	-79.8577270612435
2011	-79.6563043318559
2012	-79.4548816024683