Year	%
1996	41.66371
1999	31.69732
2001	36.59583
2002	38.08651
2003	37.00827
2006	34.12496
2007	42.19947
2008	42.63124
2009	37.8268
2010	37.74722
2011	43.07118
2012	32.59534
2013	41.51487
2014	41.51487
2015	40.96245
2016	38.83313
2017	38.82883
2018	30.45621
2019	31.53096
2020	30.55314
2021	30.93474