Year	% change from 1990
1991	-4.08953053119049
1992	-7.6976002259163
1993	-10.676678336067
1994	-7.47215382623491
1995	-6.15024236291665
1996	-4.44234241818852
1997	-4.02771014510131
1998	-11.3454028365286
1999	-18.2840549148949
2000	-20.1118014113008
2001	-25.0628829229878
2002	-26.3793785144329
2003	-26.1792428083723
2004	-26.6228017388992
2005	-27.5045234563695
2006	-30.0790640697165
2007	-30.9956815511008
2008	-32.9827651589993
2009	-35.2939245394393
2010	-37.9924163120422
2011	-39.1037462963928
2012	-39.784955334427