Year	%
1996	38.6042
1999	32.54333
2000	32.65204
2001	33.24416
2002	33.68474
2003	32.82352
2006	32.52663
2007	37.07019
2008	38.66853
2009	35.69657
2010	38.3819
2011	36.40912
2012	29.04075
2013	30.42115
2015	36.06017
2016	35.68402
2017	33.88606
2018	28.23594
2019	23.17581
2020	27.35297
2021	27.29786