Year	Number
1960	1953
1961	7359
1962	2892
1963	3212
1964	7966
1965	3644
1966	3876
1967	4204
1968	33345
1969	35754
1970	38628
1971	41913
1972	57460
1973	48340
1974	51112
1975	53248
1976	54819
1977	49981
1978	27301
1979	-4806
1980	-46294
1981	-46800
1982	-45146
1983	45680
1984	-39236
1985	75784
1986	19500
1987	87941
1988	-76750
1989	-76094
1990	-88284
1991	-91874
1992	-95865
1993	288072
1994	349345
1995	-109903
1996	-472926
1997	-13340
1998	-119727
1999	-11552
2000	-12539
2001	-124527
2002	-118044
2003	-127010
2004	-126446
2005	-128147
2006	-128070
2007	-126739
2008	-184748
2009	-324470
2010	-121993
2011	-84433
2012	-49713
2013	1346
2014	-21079
2015	201562
2016	124444
2017	101235
2018	-56813
2019	-64819
2020	-15795
2021	-4865
2022	-39997
2023	-39997