Year	Number
1973	395
1985	645
1994	1232
1995	930
1997	868
2002	1422
2004	1475
2005	1716
2006	1499
2007	1940
2008	1912
2009	1951
2010	2168
2011	2142
2012	1604
2013	1724
2014	1759
2015	1611
2016	1703
2017	1611
2018	1589
2019	1702
2021	1654