Year	Number
1996	5.91397857666016
1998	5.34759378433228
2000	5.85106372833252
2002	8.99470901489258
2003	17.4603176116943
2004	21.1822662353516
2005	19.5121955871582
2006	21.9512195587158
2007	29.1262130737305
2008	30.5825233459473
2009	25.3588523864746
2010	23.3333339691162
2011	27.488151550293
2012	36.4928894042969
2013	35.5450248718262
2014	34.6153831481934
2015	33.3333320617676
2016	30.9523811340332
2017	23.3333339691162
2018	17.619047164917
2019	19.0476188659668
2020	18.0952377319336
2021	17.619047164917
2022	23.5849056243896