Year	%
1989	82.96335
1990	66.14822
1991	52.8144
1992	47.07633
1993	32.72715
1994	27.72261
1995	24.57718
1996	19.98002
1997	19.57209
1998	29.47523
1999	11.1238
2000	26.36415
2001	27.41373
2002	27.93666
2003	27.13847
2004	21.70295
2005	13.63304
2006	13.102
2007	13.35785
2008	13.35674
2009	13.08208
2010	12.78383
2011	13.52216
2012	14.086
2013	16.98297
2014	14.66512
2015	15.29826
2016	15.43406
2017	16.28034
2018	16.21622
2019	15.78339
2020	15.82104
2021	15.43767