Year	Number
1990	1479
1991	1535
1992	1583
1993	1563
1994	1576
1995	1564
1996	1547
1997	1543
1998	1546
1999	1546
2000	1546
2001	1544
2002	1544
2003	1538
2004	1546
2005	1532
2006	1528
2007	1527
2008	1527
2009	1528
2010	1527
2011	1532
2012	1544
2013	1562
2014	1584
2015	1607
2016	1624
2017	1623
2018	1607
2019	1590
2020	1580
2021	1573
2022	1575