Year	%
1997	35.64787
1998	0.815394
1999	1.270125
2000	1.385574
2001	1.352206
2002	1.272167
2003	1.378297
2004	2.197885
2005	1.78398
2006	1.712673
2007	34.45106
2008	34.24227
2009	2.290532
2010	2.049909
2011	0.9182699
2012	1.149837
2013	21.53358
2015	0.6169806
2020	1.608048
2021	1.41728