Year	% change from 1990
1991	-1.29918596785856
1992	-2.12954540153477
1993	-4.07949058848226
1994	-3.91777264634308
1995	-3.7179576889884
1996	-3.57256703908443
1997	-13.3829372021241
1998	-11.4003374307062
1999	-8.95202108553168
2000	-5.86849532339702
2001	-17.0270333310009
2002	-17.6777925500898
2003	-18.4428428148252
2004	-22.6373241900497
2005	-19.7249240003421
2006	-21.4408446652516
2007	-19.8563198283302
2008	-19.4535799531951
2009	-17.7392142684984
2010	-16.6196285152271
2011	-15.7858248003794
2012	-14.9520210855317