Year	Number
1996	28.73
1997	39.32
1998	39.05
1999	53.82
2000	37.82
2001	42.27
2002	46.61
2003	50.47
2004	44.6
2005	63.43
2006	68.72
2007	85.95
2008	92.85
2009	85.25
2010	78.76
2011	81.52
2012	84.43
2013	89.8
2014	87.51
2015	87.18
2016	91.58
2017	90.47
2018	103.47
2019	109.83
2020	152.33