Year	Number
1960	-24974
1961	-650
1962	6071
1963	-18074
1964	-16856
1965	-12261
1966	-16716
1967	-181606
1968	-144389
1969	-52807
1970	-10510
1971	28445
1972	52257
1973	80665
1974	53621
1975	58626
1976	77674
1977	-27834
1978	-31297
1979	-29008
1980	-19516
1981	-23851
1982	-10995
1983	-8009
1984	-34940
1985	-29179
1986	-50569
1987	-44277
1988	-48425
1989	-31258
1990	-39265
1991	-32488
1992	-76545
1993	-76366
1994	-80789
1995	-75823
1996	-70462
1997	-88880
1998	-89939
1999	-85301
2000	-91807
2001	-87561
2002	-101632
2003	-97597
2004	-106593
2005	-129933
2006	-125012
2007	-127609
2008	-138327
2009	-129392
2010	-112173
2011	-47867
2012	-21485
2013	-13890
2014	-20445
2015	-49612
2016	-64002
2017	-58735
2018	-57865
2019	-25453
2020	-12724
2021	-12724
2022	916813
2023	-254616