Year	Number
1996	5.7
1997	12.44
1998	11.41
1999	12.98
2000	14.82
2001	11.31
2002	11.62
2003	11.68
2004	16.84
2005	50.8
2006	29.36
2007	35.23
2008	60.76
2009	87.8
2010	50.98
2011	95.42
2012	38.85
2013	34.57
2014	46.86
2015	69.16
2016	86.59
2017	143.63
2018	220.55
2019	281.53
2020	418.5