Year	Number
1996	60.7526893615723
1998	50.2673797607422
2000	28.7234039306641
2002	23.8095245361328
2003	21.1640205383301
2004	17.7339897155762
2005	15.6097564697266
2006	10.2439022064209
2007	10.6796112060547
2008	12.62135887146
2009	11.9617223739624
2010	12.380952835083
2011	10.9004735946655
2012	10.9004735946655
2013	9.95260620117188
2014	9.61538505554199
2015	11.9047622680664
2016	12.8571424484253
2017	12.380952835083
2018	13.8095235824585
2019	14.2857141494751
2020	16.1904754638672
2021	17.619047164917
2022	17.9245281219482