Year	%
1996	34.06
1999	31.17
2000	31.95
2001	37.39
2002	37.03
2003	37.08
2004	27.9
2006	23.62
2007	26.36
2010	23.29
2011	22.98
2012	17.4
2013	25.99
2020	19.21
2021	18.98