Year	%
1988	77.05187
1989	77.07732
1990	58.1488
1992	58.04268
1993	55.82905
1994	55.27732
1995	54.9138
1996	43.71161
1997	33.50117
1998	23.06363
1999	21.10225
2000	7.062637
2001	6.300935
2002	0.5252777
2003	0.4634719
2004	4.344157
2005	4.344157
2006	4.317612
2007	16.14054
2008	4.303794
2009	4.900824
2010	4.898273
2011	3.32518
2012	2.995271
2013	3.626711
2015	3.655122
2016	4.158388
2017	11.11249
2018	3.216621
2019	3.008031
2020	3.736443
2021	2.657317