Year	Number
1996	178.4
1997	202.34
1998	169.51
1999	199.92
2000	202.08
2001	241.05
2002	234.14
2003	298.21
2004	332.95
2005	401.73
2006	456.02
2007	505.73
2008	772.48
2009	881.38
2010	1088.83
2011	1202.29
2012	1556.26
2013	1855.67
2014	1916.75
2015	2176.37
2016	2978.33
2017	3184.06
2018	4088.91
2019	5812.63
2020	8213.16