Year	Number
1996	42.5531921386719
1998	47.8723411560059
2000	42.3280410766602
2002	47.0899467468262
2003	27.6381912231445
2004	15.0485439300537
2005	11.1650485992432
2006	8.21256065368652
2007	9.17874431610107
2008	8.65384578704834
2009	5.21327018737793
2010	4.26540279388428
2011	5.68720388412476
2012	6.63507127761841
2013	6.63507127761841
2014	9.0476188659668
2015	9.0476188659668
2016	10
2017	11.9047622680664
2018	12.2641506195068
2019	17.4528293609619
2020	15.0943393707275
2021	17.9245281219482
2022	19.3396224975586