Year	Number
1978	144800
1979	16600
1980	960
1981	2500
1982	18970
1983	23520
1984	35020
1985	52650
1986	67550
1987	68540
1988	86563
1989	97698
1990	52617
1991	46789
1992	44275
1993	33056
1994	28596
1995	23936
1996	22818
1997	22495
1998	21390
1999	20572
2000	5070
2001	4397
2002	4049
2003	3984
2004	1822
2005	1463
2006	1827
2007	1899
2008	1533
2009	1473
2010	1426
2011	1464
2012	1526
2013	1530
2014	1580
2015	1469
2016	1409
2017	1467
2018	1671
2019	4376
2020	8701
2021	11041
2022	16087
2023	25483