Year	%
1991	11.532297596067197
1992	18.874831069884166
1993	12.724494015166885
1994	15.13399662679191
1995	5.000306937546114
1996	11.672686716580557
1998	-29.932136001718536
1999	-42.09865183897081
2000	5.77111514812214
2001	15.8895002535025
2002	21.64710396111534
2003	15.028555890074438
2004	16.767096939164876
2005	16.74609430174698
2006	17.323118305172134
2007	19.60354616452571
2008	13.904160922075421
2009	28.544004739746434
2010	12.286034947863193