Year	Number
1996	34.91
1997	26.68
1998	41.61
1999	37.16
2000	38.26
2001	32
2002	24.27
2003	36.66
2004	36.67
2005	34.48
2006	41.16
2007	43.31
2008	50.09
2009	50.68
2010	56.82
2011	79.94
2012	114.89
2013	121.77
2014	182.85
2015	171.32
2016	218.41
2017	198.45
2018	288.21
2019	221.81
2020	286.84