Year	Percent
1990	32.14199
1991	9.12136
1992	6.44039
1993	5.69491
1994	6.48117
1995	4.47766
1996	4.93915
1997	5.67649
1998	6.95763
1999	4.89879
2000	5.71067
2001	4.94147
2002	5.68188
2003	13.89364
2004	5.46335
2005	4.67321
2006	18.09935
2007	16.23876
2008	13.10513
2009	6.08693
2010	4.64271
2011	4.43596
2012	6.52193
2013	4.80195
2014	6.83668
2015	8.70257
2016	9.54092
2017	11.27818
2018	11.52055
2019	19.44401
2020	55.34977
2021	112.76119