Year	%
2001	19.56443
2002	16.5199
2004	19.81414
2005	17.47167
2006	17.78652
2007	18.48429
2008	26.74866
2009	27.8301
2010	18.00311
2011	25.85196
2012	17.92966
2013	27.08992
2014	27.05138
2015	27.41683
2016	29.26784
2017	23.33642
2018	17.49724
2019	16.67317
2020	18.92477
2021	19.56634