Year	Number
1996	51.93
1997	34.39
1998	37.06
1999	58.99
2000	60.66
2001	61.8
2002	41.2
2003	65.45
2004	49.41
2005	57.11
2006	61
2007	108.79
2008	82.64
2009	84.76
2010	79.98
2011	91.29
2012	92.11
2013	112.7
2014	110.63
2015	105.88
2016	100.33
2017	131.96
2018	124.28
2019	114.54
2020	163.25