Year	Number
1996	31.9148941040039
1998	42.5531921386719
2000	32.2751312255859
2002	25.3968257904053
2003	21.1055278778076
2004	20.3883495330811
2005	13.5922327041626
2006	12.5603866577148
2007	9.17874431610107
2008	10.5769233703613
2009	12.7962083816528
2010	12.3222751617432
2011	14.2180099487305
2012	13.2701425552368
2013	17.0616111755371
2014	13.3333330154419
2015	10
2016	10.4761905670166
2017	9.0476188659668
2018	14.6226415634155
2019	16.0377349853516
2020	10.3773584365845
2021	5.66037750244141
2022	8.01886749267578