Year	%
1996	42.62115
1999	36.30095
2001	38.91418
2002	40.96794
2003	39.8051
2006	35.87183
2007	43.34929
2008	43.82792
2009	39.46376
2010	39.45773
2011	43.78255
2012	33.82914
2013	42.33278
2014	42.33278
2015	41.82791
2016	40.19353
2017	40.08161
2018	32.40198
2019	33.21486
2020	33.38049
2021	33.84207