Year	%
1996	26.35
1999	26.06
2000	26.02
2001	26.94
2002	26.61
2003	26.47
2004	23.63
2006	21.23
2007	22.6
2010	15.42
2011	15.39
2012	15.97
2013	22.83
2020	21.71
2021	21.69