Year	Number
1996	73.03
1997	76.46
1998	86.1
1999	79.34
2000	88.81
2001	107.09
2002	111.99
2003	121.05
2004	129.67
2005	174.05
2006	129.66
2007	167.88
2008	160.74
2009	212.02
2010	213.42
2011	219.34
2012	203.67
2013	158.26
2014	237.56
2015	149.99
2016	203.1
2017	214.38
2018	221.69
2019	228.69
2020	237.39