Year	%
1996	41.15
1997	25.14
1998	20.94
1999	25.34
2000	21.7
2001	19
2002	17.82
2003	16.28
2007	18.6
2010	16.48
2011	12.09
2012	17.17
2015	12.97
2016	9.78
2021	17.97