Year	Number
1960	-145608
1961	-133680
1962	-34465
1963	-32983
1964	-28503
1965	-37417
1966	-41084
1967	-40540
1968	-59536
1969	-47564
1970	-67909
1971	-58091
1972	46122
1973	47614
1974	46875
1975	46976
1976	54058
1977	53296
1978	49142
1979	48337
1980	261163
1981	-9842
1982	-43214
1983	-36074
1984	-31310
1985	-19940
1986	-16397
1987	-5191
1988	7922
1989	13310
1990	21268
1991	20830
1992	27442
1993	27613
1994	24764
1995	28851
1996	54527
1997	51034
1998	42190
1999	39982
2000	49166
2001	47084
2002	222527
2003	478254
2004	417189
2005	250910
2006	210398
2007	485871
2008	413349
2009	280126
2010	270043
2011	195257
2012	249033
2013	154366
2014	50102
2015	34031
2016	49591
2017	70475
2018	75863
2019	21615
2020	28021
2021	28021
2022	58496
2023	58496