Year	%
1988	12.45447
1989	17.69554
1990	4.383404
1991	3.562342
1992	3.815192
1993	3.734529
1994	3.785446
1995	2.519109
1996	1.382613
1997	1.27412
1998	1.855131
1999	6.68091
2000	1.241509
2001	1.375752
2002	1.35586
2003	1.229806
2004	1.491698
2005	1.010172
2006	1.014029
2007	0.9357632
2008	0.8433674
2009	1.02311
2010	0.9867887
2011	0.9347487
2012	0.9842589
2013	0.9322362
2014	0.9022391
2015	0.8827925
2016	0.6346312
2017	0.8638234
2018	0.9019911
2019	0.9538649
2020	8.122205
2021	0.6922113