Year	%
1992	44.92516
1995	26.50209
1997	30.03017
1998	36.59037
1999	33.97074
2000	32.97226
2001	35.20789
2002	36.25419
2003	35.04748
2004	30.05198
2005	29.31703
2006	27.9931
2007	41.05312
2008	43.51194
2009	44.23886
2010	30.71551
2011	43.22771
2012	27.71588
2013	41.46936
2014	38.34772
2015	33.25035
2016	36.08167
2017	39.6352
2018	32.25701
2019	40.85366
2020	46.63533
2021	40.86594