Year	Number
1970	26
1971	26
1998	724
1999	874
2000	1310
2001	1884
2002	1691
2003	2088
2010	3486
2011	3080
2012	3103
2013	3648
2014	3723
2015	3351
2016	3310
2017	3430
2018	3665
2019	3682