Year	%
1991	69.46
1993	9.28
1996	8.51
1997	8.04
1998	8.12
1999	7.61
2000	6.66
2001	1.08
2002	1.13
2003	1.13
2004	1.07
2005	0.95
2006	0.73
2007	0.88
2008	0.78
2009	0.89
2010	0.86
2011	0.71
2012	0.67
2013	0.7
2014	0.79
2015	1.06
2016	1.18
2017	1.69
2018	1.49
2019	1.58
2020	1.83
2021	1.89