Year	Number
1996	74.49
1997	73.06
1998	87.79
1999	88.82
2000	111.88
2001	102.48
2002	121.09
2003	124.09
2004	133.42
2005	123.28
2006	181.31
2007	151.12
2008	164.51
2009	161.66
2010	151.72
2011	164.28
2012	150.69
2013	166.82
2014	193.63
2015	163.74
2016	207.65
2017	232.26
2018	289.75
2019	304.12
2020	329.26