Year	%
1988	77.00181
1989	77.07838
1990	59.46795
1992	59.28114
1993	57.37642
1994	56.53916
1995	56.5336
1996	44.50778
1997	36.03429
1998	24.50627
1999	22.10872
2000	7.452278
2001	6.64447
2002	1.587589
2003	1.574889
2004	4.672792
2005	4.672792
2006	4.66012
2007	15.9686
2008	4.973702
2009	5.076101
2010	5.058745
2011	3.573784
2012	3.332976
2013	3.784255
2015	3.800133
2016	4.331185
2017	11.29258
2018	3.50494
2019	3.158467
2020	3.828029
2021	2.841186