Year	Number
1996	40
1998	41.7910461425781
2000	38.8059692382813
2002	37.8109436035156
2003	35.8208961486816
2004	37.980770111084
2005	38.9423065185547
2006	41.8269233703613
2007	34.1346168518066
2008	28.8461532592773
2009	29.3838863372803
2010	29.8578205108643
2011	26.7605628967285
2012	27.2300472259521
2013	27.6995296478271
2014	29.0640392303467
2015	27.0935955047607
2016	23.645320892334
2017	24.630542755127
2018	29.6116504669189
2019	25.1207733154297
2020	23.6714973449707
2021	24.6376819610596
2022	27.0531406402588