Year	%
1996	39.24
1997	17.62
1998	16.31
1999	18.13
2000	15.99
2001	14.29
2002	15.57
2003	15.06
2007	13.98
2010	16
2011	12.48
2012	15.5
2015	12.59
2016	11.01
2021	12.38