Year	Number
1995	31.62624
1996	32.3258
1997	42.3375
1998	34.88593
2001	21.1797
2002	21.174
2003	21.17143
2006	35.11149
2007	36.15298
2008	37.55406
2009	37.49518
2010	37.49069
2011	44.01483
2013	20.54173
2014	19.6666
2015	21.22737
2016	18.82403
2017	20.33355
2018	19.63666