Year	%
1992	1.044486
1993	1.258514
1996	1.300323
1997	1.307691
1998	1.533724
1999	1.47629
2000	1.51493
2001	0.7063316
2002	1.360575
2003	1.301122
2004	2.040545
2005	2.525119
2006	1.209395
2007	0.6977332
2008	0.7565034
2009	0.7386273
2010	1.666287
2011	0.7402537
2012	0.7527547
2013	0.6440977
2014	0
2015	0.6303161
2016	0.6258683
2017	0.6545531
2019	0.6836478
2020	0.6175269
2021	0.5379973