Year	Number
1996	23.6559143066406
1998	28.8770046234131
2000	19.1489353179932
2002	24.8677253723145
2003	17.4603176116943
2004	20.1970443725586
2005	22.9268283843994
2006	20.4878044128418
2007	24.7572822570801
2008	26.6990299224854
2009	27.2727279663086
2010	28.0952377319336
2011	23.6966819763184
2012	22.748815536499
2013	21.8009471893311
2014	17.7884616851807
2015	14.7619047164917
2016	11.9047622680664
2017	12.8571424484253
2018	13.8095235824585
2019	12.380952835083
2020	16.1904754638672
2021	14.7619047164917
2022	15.0943393707275