Year	Number
1996	83.4
1997	74.57
1998	99.55
1999	117.57
2000	130.85
2001	135.69
2002	130.89
2003	138.04
2004	191.62
2005	219.03
2006	209.73
2007	277.74
2008	249.81
2009	305.51
2010	404.84
2011	414.14
2012	444.93
2013	470.21
2014	507.19
2015	604.13
2016	595.05
2017	642.79
2018	676.08
2019	794.85
2020	934.01