Year	Percent
1990	64.22083
1991	51.87058
1992	44.5879
1993	46.12645
1994	50.69225
1995	56.24385
1996	56.576
1997	51.39968
1998	44.49576
1999	33.64676
2000	44.71363
2001	45.18021
2002	69.32466
2003	72.25033
2004	80.71901
2005	79.09089
2006	84.24193
2007	79.54092
2008	81.76424
2009	79.02833
2010	88.73069
2011	77.79974
2012	101.30962
2013	107.62887
2014	97.22254
2015	79.249
2016	51.77143
2017	53.54583