Year	Number
1996	7645.85
1997	9303.48
1998	10498.24
1999	11423.81
2000	12800.36
2001	13914.7
2002	16156.58
2003	17622.42
2004	19845.26
2005	22310.98
2006	28458.07
2007	31032.13
2008	35400.27
2009	38335.13
2010	41501.01
2011	43983.61
2012	47867.35
2013	50027.41
2014	51802.81
2015	52882.71
2016	55010.17
2017	58114.05
2018	61796.95
2019	64376.69
2020	70291.66