Year	Number
1960	-15052
1961	-4696
1962	9064
1963	-5816
1964	-36257
1965	-71560
1966	19371
1967	54081
1968	15388
1969	-39151
1970	-90600
1971	-131795
1972	-139110
1973	-146065
1974	-172301
1975	-193902
1976	-124283
1977	-82660
1978	-116087
1979	-151025
1980	-126640
1981	-178244
1982	23725
1983	39876
1984	21786
1985	8961
1986	-24276
1987	-33976
1988	-23045
1989	-27930
1990	-22662
1991	-58319
1992	-41604
1993	-29375
1994	-31467
1995	-81045
1996	-77332
1997	-110940
1998	-99944
1999	-109485
2000	-77647
2001	-64004
2002	-92952
2003	-4115
2004	12764
2005	-23548
2006	-59360
2007	-85513
2008	-75192
2009	31992
2010	69638
2011	68855
2012	297814
2013	393572
2014	703144
2015	341261
2016	375842
2017	-252010
2018	-261813
2019	-218341
2020	-80952
2021	-69729
2022	-301586
2023	-318067