Year	Number
1996	36
1998	39.8009948730469
2000	17.9104480743408
2002	40.7960205078125
2003	31.343282699585
2004	33.1730766296387
2005	28.8461532592773
2006	38.9423065185547
2007	34.6153831481934
2008	37.980770111084
2009	36.0189590454102
2010	34.1232223510742
2011	35.2112693786621
2012	34.2723007202148
2013	32.8638496398926
2014	37.9310340881348
2015	36.9458122253418
2016	36.9458122253418
2017	35.9605903625488
2018	32.0388336181641
2019	27.5362319946289
2020	27.0531406402588
2021	28.9855079650879
2022	24.6376819610596