Year	%
1993	20.4398
1996	14.13317
1997	13.5468
1998	14.13317
1999	17.36509
2000	19.37114
2001	22.87871
2002	16.69565
2003	24.40752
2004	21.68861
2005	20.17949
2006	23.02427
2007	37.49222
2008	36.68326
2009	36.0161
2010	24.04415
2011	36.6108
2012	25.02585
2013	39.95404
2015	36.91211
2016	39.40455
2017	37.05374
2019	22.35996
2020	24.04139
2021	24.03941