Year	%
1993	19.39595
1994	18.17978
1995	18.45726
1996	18.32086
1997	16.58341
1998	19.25718
1999	32.93124
2000	17.91573
2001	19.65894
2002	20.24851
2003	20.38938
2004	20.42979
2005	23.45611
2006	17.20668
2007	34.35718
2008	30.556
2009	26.41605
2010	19.74558
2011	24.11903
2012	14.52737
2014	25.00182
2015	32.06446
2016	31.5753
2017	25.84914
2018	20.63448
2019	20.66136
2020	17.87758
2021	15.85954