Year	%
1993	37.85503
1997	65.86779
1998	62.95641
2000	66.63682
2003	41.40705
2005	36.1151
2006	36.21807
2007	36.96327
2008	38.98658
2009	38.83784
2010	39.1624
2011	38.21382
2012	38.93683
2013	38.93253
2014	38.43323
2015	34.9264
2016	36.13977
2018	36.45045
2019	36.16858
2020	36.02703
2021	35.03257