Year	Number
1996	45.5
1998	31.8407955169678
2000	40.2985076904297
2002	42.2885589599609
2003	45.7711448669434
2004	49.519229888916
2005	50.961540222168
2006	45.6730766296387
2007	46.1538467407227
2008	46.1538467407227
2009	45.497631072998
2010	44.5497627258301
2011	44.1314544677734
2012	41.7840385437012
2013	40.8450698852539
2014	36.4532012939453
2015	35.4679794311523
2016	30.0492610931396
2017	27.5862064361572
2018	24.7572822570801
2019	24.1545886993408
2020	24.1545886993408
2021	23.6714973449707
2022	23.1884059906006