Year	Number
1996	19.1256828308105
1998	15.8469944000244
2000	14.7540979385376
2002	10.2702703475952
2003	16.2162170410156
2004	15.4228858947754
2005	25.4901962280273
2006	18.536584854126
2007	20.8737869262695
2008	20.3883495330811
2009	20.5741634368896
2010	19.6172256469727
2011	21.3270149230957
2012	21.3270149230957
2013	21.3270149230957
2014	17.3076915740967
2015	14.7619047164917
2016	21.4285717010498
2017	20
2018	31.9047622680664
2019	32.3809509277344
2020	32.8571434020996
2021	28.0952377319336
2022	29.7169818878174