Year	Number
1960	-163
1961	-182
1962	-193
1963	-200
1964	-1636
1965	-3842
1966	-6068
1967	-7639
1968	-8105
1969	-8536
1970	-9056
1971	-9562
1972	-9934
1973	-10087
1974	-10083
1975	-10012
1976	-12763
1977	-13000
1978	-14790
1979	-24027
1980	-27793
1981	-28294
1982	-28491
1983	-28598
1984	-28100
1985	-27358
1986	-26654
1987	-26077
1988	-25287
1989	-101987
1990	-28017
1991	-25282
1992	-23316
1993	-22817
1994	-37037
1995	-37975
1996	-38092
1997	-40423
1998	-46097
1999	5300
2000	15938
2001	16248
2002	15071
2003	13154
2004	13488
2005	16436
2006	16909
2007	17111
2008	15048
2009	890
2010	1384
2011	1688
2012	1988
2013	2289
2014	1084
2015	1084
2016	1484
2017	1184
2018	1583
2019	392
2020	1084
2021	1084
2022	0
2023	0