Year	%
1991	1.054908
1992	15.98208
1994	18.95681
1995	21.93877
1996	18.64142
1997	19.57094
1998	19.27937
1999	19.58878
2000	21.74633
2001	21.75531
2002	22.35183
2003	21.91409
2004	20.15037
2005	20.94407
2006	18.76006
2007	41.47353
2008	41.77643
2009	41.64028
2010	19.47391
2011	16.46287
2012	0.4976864
2013	16.86049
2014	16.72037
2015	0.5578644
2016	0.5526702
2017	8.507753
2018	0.2472499
2019	0.2639208
2020	0.1763467
2021	5.763388