Year	Number
1996	3.19148945808411
1998	1.59574472904205
2000	2.11640214920044
2002	0.52910053730011
2003	1.50753772258759
2004	0.970873773097992
2005	7.28155326843262
2006	9.17874431610107
2007	9.66183567047119
2008	9.13461494445801
2009	12.7962083816528
2010	6.63507127761841
2011	4.7393364906311
2012	5.68720388412476
2013	8.53080558776855
2014	20.4761905670166
2015	5.7142858505249
2016	5.7142858505249
2017	4.2857141494751
2018	7.54716968536377
2019	7.07547187805176
2020	8.96226406097412
2021	11.3207550048828
2022	12.7358493804932