Year	Number
1996	31.72
1997	21.45
1998	40.47
1999	22.48
2000	16.01
2001	28.39
2002	32.91
2003	35.36
2004	33.89
2005	40.93
2006	64.61
2007	68.1
2008	66.07
2009	68.05
2010	74.37
2011	86.95
2012	84.82
2013	61.61
2014	70.27
2015	66.55
2016	76.88
2017	98.8
2018	86.42
2019	90.19
2020	98.9