Year	%
2000	4.735845
2001	5.379385
2002	4.413824
2003	3.869537
2004	4.954501
2005	4.539374
2006	4.408581
2007	4.164218
2008	4.166736
2009	5.306196
2010	4.310875
2011	4.127589
2012	4.304074
2013	3.993419
2014	4.051143
2015	4.061562
2016	3.539188
2017	4.410281
2018	4.316236
2019	4.235533
2020	29.25539
2021	0.0354198