Year	Percent
1992	2.16369
1993	21.04964
1994	58.72456
1995	48.18496
1996	45.02016
1997	40.29037
1998	43.31299
1999	62.84788
2000	57.50079
2001	58.71788
2002	59.70533
2003	53.64969
2004	44.5143
2005	33.2339
2006	32.53872
2007	29.25562
2008	61.17128
2009	81.44083
2010	85.61402
2011	81.07447
2012	78.97044
2013	85.04543
2014	85.80176
2015	108.87162
2016	117.99693