Year	%
1996	0.41
1997	0.43
1998	0.56
1999	0.87
2000	1.47
2002	1.5
2003	1.14
2004	1.45
2005	1.48
2006	1.91
2009	0.71
2010	0.93
2018	1.33
2019	1.35