Year	Number
1996	2
1998	4.47761201858521
2000	33.8308448791504
2002	34.3283576965332
2003	35.8208961486816
2004	33.6538467407227
2005	30.2884616851807
2006	31.25
2007	30.769229888916
2008	28.8461532592773
2009	21.3270149230957
2010	23.6966819763184
2011	31.9248828887939
2012	31.9248828887939
2013	30.9859161376953
2014	33.9901466369629
2015	32.5123138427734
2016	29.0640392303467
2017	28.5714282989502
2018	25.2427177429199
2019	25.1207733154297
2020	29.468599319458
2021	32.3671493530273
2022	32.3671493530273