Year	% change from 1990
1991	-3.88946568569836
1992	-7.15124761588416
1993	-10.4488671748233
1994	-14.646608341924
1995	-17.4555169914526
1996	-16.5175530456489
1997	-20.4486524284335
1998	-19.3031333678104
1999	-22.5704503136539
2000	-20.7590090371432
2001	-21.6982180829838
2002	-20.7178136754161
2003	-19.5214617035431
2004	-21.3147662884027
2005	-20.5743034778088
2006	-20.7860199103342
2007	-20.0883569148786
2008	-18.764986139014
2009	-19.8647478048938
2010	-17.443160693593
2011	-17.7356186061768
2012	-17.6679510627705