Year	Number
1996	13
1998	9.95024871826172
2000	30.8457717895508
2002	31.8407955169678
2003	31.343282699585
2004	33.6538467407227
2005	36.0576934814453
2006	36.538459777832
2007	39.4230766296387
2008	41.3461532592773
2009	40.7582931518555
2010	38.8625602722168
2011	41.3145523071289
2012	44.1314544677734
2013	43.1924896240234
2014	46.7980308532715
2015	46.305419921875
2016	44.8275871276855
2017	42.8571434020996
2018	43.2038841247559
2019	42.9951705932617
2020	40.5797119140625
2021	44.4444427490234
2022	42.9951705932617