Year	Number
1990	4112
1991	4042
1992	3970
1993	3868
1994	3716
1995	3519
1996	3296
1997	3084
1998	2912
1999	2783
2000	2701
2001	2644
2002	2570
2003	2464
2004	2343
2005	2226
2006	2121
2007	2033
2008	1969
2009	1917
2010	1852
2011	1772
2012	1687
2013	1599
2014	1516
2015	1455
2016	1416
2017	1391
2018	1377
2019	1379
2020	1386
2021	1397
2022	1404