Year	%
1992	65.90944
1993	63.20728
1994	63.63066
1996	44.49856
1997	34.56993
1998	33.41003
1999	35.7026
2000	37.20517
2001	36.52144
2002	28.85069
2003	23.40757
2004	17.19168
2005	14.42645
2006	14.92724
2007	18.64407
2008	19.30344
2009	18.47371
2010	14.29845
2011	18.60546
2014	17.61351
2015	18.23052
2016	19.14344
2017	22.47207
2018	13.92848
2019	7.158552
2020	7.190919
2021	6.91582