Year	Number
1996	50.89
1997	67.53
1998	56.66
1999	60.22
2000	33.6
2001	52.96
2002	59.67
2003	47.64
2004	42.84
2005	61.04
2006	68.62
2007	68.02
2008	91.91
2009	76.75
2010	87.23
2011	99.99
2012	106.27
2013	118.44
2014	128.98
2015	157.32
2016	173.75
2017	204.95
2018	213.79
2019	206.11
2020	263.09