Year	Number
1996	56.78
1997	99.62
1998	94.52
1999	66.82
2000	73.7
2001	60.41
2002	91.3
2003	98.81
2004	93.53
2005	131.53
2006	131.33
2007	143.23
2008	150.8
2009	178.88
2010	191.29
2011	169.82
2012	244.8
2013	259.38
2014	393.39
2015	638.14
2016	1125.33
2017	1586.96
2018	2100.33
2019	2308.59
2020	2847.83