Year	%
1999	14.12
2000	18.98
2001	7.53
2002	7.9
2004	6.15
2005	7.72
2006	5.57
2007	6.83
2014	4.93
2015	4.81
2016	4.16
2017	2.41
2018	3.7
2019	3.66
2020	3.78