Year	%
1992	14.15
1997	3.6
2001	31.95
2002	31.61
2003	5.12
2004	4.05
2005	2.9
2006	3.13
2007	3.03
2008	3.02
2009	2.77
2012	2.54
2013	2.38
2014	2.36
2015	2.2
2016	1.79
2017	1.92
2018	1.92
2019	1.74
2020	1.74
2021	2.07