Year	% change from 1990
1991	-9.64598996240759
1992	-14.2555967092382
1993	-5.90120641116613
1994	1.66832354601136
1995	4.50734160371931
1996	6.9780349002025
1997	9.46588037377012
1998	16.5232320306531
1999	18.0052070894231
2000	14.137768244099
2001	15.0172097243263
2002	16.4737038243029
2003	19.8467573718938
2004	18.043617628221
2005	18.1944636566036
2006	17.9542568687812
2007	18.4878397425994
2008	19.4812055663876
2009	17.6970044282382
2010	19.5416924501637
2011	20.814209912613
2012	22.0733444711228