Year	Percent
1992	1.1662
1993	1.189
1994	1.20696
1995	2.16977
1996	2.16385
1997	2.80828
1998	3.345
1999	2.84077
2000	2.82794
2001	3.11537
2002	2.3991
2003	2.35474
2004	1.95224
2005	2.17122
2006	2.15881
2007	2.12314
2008	2.08545
2009	0.86631
2010	0.85725
2011	0.85533
2012	0.85582
2013	0.8415
2014	0.83681
2015	1.64167
2016	1.65044
2017	1.679
2018	1.67071
2019	1.65795
2020	1.69031