Year	% change from 1990
1991	-11.9363841971031
1992	-20.9566430874356
1993	-26.8172315523261
1994	-22.6058525683183
1995	-24.0489442813681
1996	-21.7316565880158
1997	-26.4699592041876
1998	-30.1816830544996
1999	-32.5569831416518
2000	-32.7930427901555
2001	-34.7841778547712
2002	-35.0239802383588
2003	-31.1074753113154
2004	-30.1180565580739
2005	-30.5538178571238
2006	-29.1313111870352
2007	-28.6765688743457
2008	-28.2670067208829
2009	-29.8376187650044
2010	-30.1819503927198
2011	-30.5555770668051
2012	-31.2734016994955