Year	Number
1996	2.12765955924988
1998	3.72340416908264
2000	0
2002	13.7566137313843
2003	11.0552759170532
2004	7.76699018478394
2005	6.31067943572998
2006	5.31400966644287
2007	2.89855074882507
2008	1.92307686805725
2009	5.21327018737793
2010	9.95260620117188
2011	14.2180099487305
2012	15.6398105621338
2013	17.5355453491211
2014	23.8095245361328
2015	37.1428565979004
2016	32.8571434020996
2017	30
2018	28.7735843658447
2019	23.5849056243896
2020	27.8301887512207
2021	18.8679237365723
2022	12.7358493804932