Year	%
1991	41.55237
1994	7.636965
1995	26.55087
1996	22.59284
1997	22.25248
1998	22.28567
1999	26.77756
2000	33.39555
2001	28.99065
2002	28.40806
2003	30.90343
2004	27.32561
2005	18.31527
2006	15.57321
2007	17.30785
2008	18.67287
2009	17.85296
2010	18.72293
2011	20.15561
2012	19.32986
2013	18.93499
2014	18.59979
2015	18.42344
2016	18.92951
2017	18.00759
2018	17.62277
2019	17.61806
2020	16.1081
2021	17.07888