Year	Number
1996	225.67
1997	249.91
1998	206.05
1999	254.14
2000	235.57
2001	209.14
2002	169.7
2003	182.29
2004	140.52
2005	142
2006	170.9
2007	184.4
2008	127.24
2009	116.35
2010	148.45
2011	142.49
2012	199.11
2013	220.33
2014	269.02
2015	269.92
2016	316.99
2017	334.71
2018	406.23
2019	431.62
2020	480.16