Year	%
1981	20.2886150217863
1982	8.81974633960747
1983	13.2162359217677
1984	11.1460070912632
1985	9.93217252844568
1986	7.86341372820419
1987	20.8791419509691
1988	10.8570702396143
1989	16.6417776219273
1990	22.3770853618819
1991	18.8366959796337
1992	20.8589892380581
1993	6.595629423062239
1994	6.489801574255461
1995	28.1299488420923
1996	8.3767307992486
1997	45.6850352637463
1998	27.7851953450257
1999	30.060005908172897
2000	46.4064454854674
2001	17.6775511408186
2002	20.4553954359008
2003	28.4253567160114
2004	29.837137524770302
2005	24.731397292473602
2006	29.3510254863616
2007	47.5392346515386
2008	43.5011961844482
2009	27.9506294512273
2010	28.0871925340219
2011	32.9397532231502
2012	26.5024612635952
2013	28.410832718593
2014	31.0784470309074
2015	29.109262927648498
2016	27.0075052374268
2017	30.055717954107802
2018	34.0022
2019	26.889
2020	56.9499
2021	49.333
2022	28.975