Year	Number
1996	12.3655910491943
1998	8.02138996124268
2000	5.85106372833252
2002	6.34920644760132
2003	10.582010269165
2004	22.1674880981445
2005	19.5121955871582
2006	37.5609741210938
2007	31.5533981323242
2008	28.6407775878906
2009	26.3157901763916
2010	21.9047622680664
2011	20.8530807495117
2012	17.0616111755371
2013	16.1137447357178
2014	15.384614944458
2015	18.0952377319336
2016	25.7142848968506
2017	26.6666660308838
2018	27.619047164917
2019	30.4761905670166
2020	28.5714282989502
2021	29.0476188659668
2022	31.1320762634277