Year	% change from 1990
1991	-35.4987352537341
1992	-35.1096742657418
1993	-40.1587241660921
1994	-31.4428042594031
1995	-37.0363010990277
1996	-42.2546461790356
1997	-45.591072659822
1998	-40.3681574047764
1999	-40.6554823223642
2000	-19.0170944416736
2001	-40.5809685989234
2002	-36.5941863399455
2003	-38.7954210820187
2004	-34.0330999894687
2005	-34.2220667921146
2006	-31.046788657223
2007	-31.3907440046258
2008	-28.8676099772882
2009	-26.9566807017404
2010	-27.9813934264987
2011	-27.2612073607636
2012	-26.5410212950286