Year	%
1990	18.42
1993	19.38
1995	39.94
1996	28.02
1997	23.66
1998	21.72
1999	22.49
2000	22.31
2001	23.7
2002	20.62
2003	24.39
2004	20.38
2005	23.87
2006	29.15
2007	19.78
2008	17.55
2009	16.93
2010	15.36
2011	19.88
2012	19.25
2013	17.99
2014	18.38
2015	17.93
2016	19.67
2017	25.75
2018	25.37
2019	30.47
2020	19.87
2021	19.9