Year	Number
1996	3385.12
1997	3768.19
1998	3724.97
1999	4017.86
2000	4231.85
2001	4356.17
2002	4681.53
2003	4478.15
2004	4602.28
2005	4861.52
2006	5552.9
2007	5659.69
2008	6217.93
2009	6802.37
2010	7135.9
2011	7624.35
2012	7753.63
2013	7895.61
2014	8218.57
2015	8305.92
2016	8485.48
2017	8624.13
2018	9090.82
2019	8984.76
2020	9729.75