Year	%
1995	6.200862
1996	6.764296
1997	6.625491
1998	6.032377
2000	5.427479
2001	4.538031
2002	3.716718
2003	3.220014
2004	1.96781
2005	37.2291
2006	45.15554
2007	40.93707
2008	41.1928
2009	38.87023
2010	38.55261
2011	39.39931
2012	39.25073
2013	39.20614
2014	37.64048
2015	40.71043
2016	30.94615
2017	24.90682
2018	29.46188
2019	28.39572
2020	28.34785
2021	29.50099