Year	%
1996	64.37057
1997	67.27039
1999	68.65068
2000	54.68661
2001	52.80506
2002	51.89831
2003	56.86187
2004	57.02114
2005	55.31367
2006	54.1379
2007	52.20015
2008	52.20015
2009	52.44799
2010	50.39214
2011	51.26452
2012	47.98545
2013	47.07151
2014	47.05122
2015	36.73969
2016	38.09811
2017	45.40881
2018	45.14682
2019	39.0913
2020	39.0913
2021	37.54462