Year	%
1991	34.67153
1994	7.907348
1995	23.71299
1996	32.15103
1997	31.40732
1998	31.64773
1999	30.19447
2000	38.39865
2001	36.93077
2002	37.39396
2003	37.54685
2004	25.49747
2005	18.84058
2006	16.74626
2007	16.83395
2008	17.32659
2009	15.78096
2010	19.36749
2011	19.16629
2012	18.32154
2013	20.48307
2014	19.54974
2015	18.29072
2016	16.02085
2017	14.66095
2018	14.64634
2019	14.64634
2020	14.48702
2021	16.48996