Year	% change from 1990
1991	-23.3521252642615
1992	-45.4337899543379
1993	-41.4152959442659
1994	-33.9254510349885
1995	-41.5295944265883
1996	-30.7445729705574
1997	-32.1210246185754
1998	-30.3452444383332
1999	-32.0305025122749
2000	-25.9248437347817
2001	-32.7904871578923
2002	-40.9031012415279
2003	-41.6533461668471
2004	-33.6604733504065
2005	-35.6702932801659
2006	-40.1757733051454
2007	-47.9649713824101
2008	-55.4221595824525
2009	-58.7729098273778
2010	-61.0405458826765
2011	-60.3920853901609
2012	-59.7436248976453