Year	Number
1960	-118519
1961	-179064
1962	-219144
1963	-219686
1964	-183384
1965	-128537
1966	-73698
1967	-37406
1968	-37291
1969	-72835
1970	-126514
1971	-180202
1972	-215730
1973	-215090
1974	-175304
1975	-115215
1976	-55120
1977	-15327
1978	-9923
1979	-13705
1980	-20131
1981	-28017
1982	-36185
1983	-43762
1984	-51959
1985	-60932
1986	-79193
1987	-169188
1988	-282270
1989	-627109
1990	-290067
1991	-757481
1992	-873177
1993	-749957
1994	-477036
1995	-625725
1996	-553915
1997	-501141
1998	-439828
1999	-492597
2000	-549792
2001	-485419
2002	-477885
2003	-527837
2004	-458505
2005	-519752
2006	-473105
2007	-438846
2008	-469093
2009	-350365
2010	-216417
2011	-147585
2012	-124641
2013	-137444
2014	-198432
2015	-155379
2016	-153054
2017	-180592
2018	-296674
2019	-302609
2020	-33649
2021	-200194
2022	-311380
2023	-310220