Year	Percent
1990	26.53479
1991	3.08757
1992	-0.69086
1993	21.78607
1994	15.31397
1995	23.77917
1996	28.99833
1997	34.23509
1998	33.36782
1999	26.49586
2000	20.674
2001	20.67537
2002	34.57618
2003	53.16952
2004	57.99046
2005	41.53484
2006	29.85938
2007	21.52501
2008	18.69363
2009	18.94864
2010	18.05958
2011	20.26785
2012	21.65363
2013	24.50655
2014	25.74385
2015	27.91357
2016	24.91676
2017	24.14811