Year	Number
1960	-44908
1961	78531
1962	32887
1963	46434
1964	68298
1965	28969
1966	233405
1967	138249
1968	73146
1969	102109
1970	-352704
1971	-128216
1972	-106744
1973	-148713
1974	-106281
1975	-43365
1976	46697
1977	12109
1978	-112100
1979	-239940
1980	-243553
1981	-345102
1982	-138160
1983	59468
1984	-39057
1985	-60802
1986	12664
1987	-24073
1988	-87808
1989	-386887
1990	-339957
1991	-505894
1992	-862365
1993	-506483
1994	-889756
1995	-553730
1996	-641143
1997	-821617
1998	-1188006
1999	-647949
2000	-30525
2001	-400386
2002	-343997
2003	-215465
2004	-231899
2005	-251418
2006	-256271
2007	-239236
2008	-212689
2009	-61918
2010	-165825
2011	-23055
2012	287660
2013	343508
2014	534556
2015	367540
2016	362637
2017	-288666
2018	-314596
2019	-218512
2020	80824
2021	66551
2022	-1357122
2023	-65115