Year	%
1998	5.36
1999	4.84
2000	5.84
2001	8.77
2002	8.95
2003	12.2
2004	11.93
2005	12.1
2006	11.09
2007	13.45
2015	15.22
2016	15.57
2017	13.8
2018	15.66