Year	Number
1996	41.7085418701172
1998	44
2000	38.3084564208984
2002	47.2636833190918
2003	49.7512435913086
2004	45.1923065185547
2005	34.9282302856445
2006	30.6220092773438
2007	29.6650714874268
2008	31.25
2009	37.4407577514648
2010	32.2274894714355
2011	38.4976539611816
2012	32.8638496398926
2013	33.8028182983398
2014	33.1730766296387
2015	30
2016	33.8095245361328
2017	31.4285717010498
2018	32.3809509277344
2019	32.3809509277344
2020	31.9047622680664
2021	33.3333320617676
2022	36.7924537658691