Year	Number
1996	14
1997	17.17
1998	22.47
1999	47.21
2000	53.71
2001	45.79
2002	63.47
2003	46.9
2004	57.18
2005	72.47
2006	59.03
2007	52.09
2008	69.14
2009	78.6
2010	85.8
2011	62.84
2012	112.62
2013	120.92
2014	121.76
2015	120.65
2016	154.48
2017	162.8
2018	132.35
2019	225.48
2020	198.76