Year	%
1988	72.8017
1989	11.53476
1990	14.12455
1992	4.341319
1995	4.342257
1996	5.220996
1997	4.818365
1998	5.4333
1999	5.137705
2000	5.567959
2001	5.414114
2002	5.473795
2003	5.87082
2004	5.575885
2005	5.817989
2006	5.576334
2007	4.704657
2008	6.070653
2009	6.459869
2010	6.632653
2011	6.66508
2012	6.595773
2013	6.468465
2014	4.589414
2015	4.421348
2016	7.015563
2017	3.969558
2018	3.672553
2020	3.464579
2021	3.264304