Year	Number
1999	13964
2000	19967
2001	13538
2002	13898
2003	13052
2004	14062
2005	14576
2006	17472
2007	23724
2008	28701
2009	32488
2010	31396
2011	35091
2012	37680
2013	41683
2014	45772
2017	58388
2018	60129
2019	45584
2020	12442
2021	1834