Year	Number
1996	33.152172088623
1998	34.2391319274902
2000	35.8695640563965
2002	30.2702693939209
2003	25.9459457397461
2004	20.8955230712891
2005	17.6470584869385
2006	22.5490188598633
2007	27.1844654083252
2008	26.6990299224854
2009	30.6220092773438
2010	31.5789470672607
2011	33.1753540039063
2012	32.7014236450195
2013	33.1753540039063
2014	39.4230766296387
2015	31.4285717010498
2016	30.4761905670166
2017	28.0952377319336
2018	32.3809509277344
2019	31.9047622680664
2020	27.1428565979004
2021	21.4285717010498
2022	26.4150943756104