Year	%
1997	30.8351
1999	30.97656
2000	21.20899
2001	21.1912
2002	21.29445
2003	21.06827
2004	21.88506
2005	21.56448
2006	11.30313
2007	20.80717
2008	19.9711
2009	10.80026
2010	19.00199
2012	11.15025
2013	11.15025
2018	5.775424
2019	7.132798
2020	7.188456
2021	6.995087