Year	%
2001	29.257
2002	28.854
2003	29.557
2004	32.038
2005	28.24
2006	33.31
2007	30.979
2008	39.042
2009	30.146
2010	33.533
2011	27.607
2012	29.891
2013	32.868
2014	34.995
2015	35.301
2016	36.232
2017	35.106
2018	33.849
2019	34.645
2020	34.163
2021	38.226