Year	Number
1960	52264
1961	114181
1962	110398
1963	48986
1964	5837
1965	19077
1966	-144807
1967	-124336
1968	-184326
1969	-171683
1970	-45792
1971	-220417
1972	-60291
1973	-62763
1974	-168162
1975	-225989
1976	-436104
1977	-31092
1978	-13841
1979	68198
1980	202323
1981	23662
1982	-26106
1983	46174
1984	-57788
1985	-112781
1986	-258917
1987	-232178
1988	-103742
1989	-13987
1990	108465
1991	-158007
1992	8198
1993	2440
1994	110095
1995	-57139
1996	-26079
1997	1240
1998	-28485
1999	-106592
2000	-149966
2001	-177306
2002	-208070
2003	-255516
2004	-214351
2005	-550186
2006	-678231
2007	-769184
2008	-846785
2009	-803437
2010	-380087
2011	-244114
2012	-180991
2013	-236387
2014	-310694
2015	-475094
2016	68119
2017	-219656
2018	-561563
2019	-593495
2020	-34772
2021	-301970
2022	-487303
2023	-486136