Year	%
1989	50.13867
1990	48.60442
1993	49.13272
1995	40.33342
1996	27.42255
1997	55.31216
1998	12.38448
1999	26.05743
2000	12.59729
2001	3.165951
2002	2.957988
2003	3.325227
2004	7.600832
2005	7.345124
2006	7.081227
2007	14.04021
2008	3.662348
2009	11.88218
2010	7.648052
2011	8.083019
2012	1.10202
2013	8.332106
2016	6.633783
2017	12.1778
2018	7.572592
2019	7.879144
2020	8.158053
2021	7.488478