Year	Number
1960	0
1961	0
1962	0
1963	0
1964	-15
1965	-51
1966	-109
1967	-163
1968	-218
1969	-291
1970	-373
1971	-444
1972	-482
1973	-477
1974	-385
1975	-243
1976	-19995
1977	-20622
1978	-1296
1979	-12106
1980	70584
1981	27854
1982	-139994
1983	-37377
1984	-3511
1985	-3597
1986	-3671
1987	-3816
1988	-16013
1989	-11241
1990	-8163
1991	-14519
1992	-13704
1993	-9597
1994	-12024
1995	-12660
1996	-12744
1997	-13843
1998	-12442
1999	-17405
2000	-21221
2001	-19204
2002	-10766
2003	-18575
2004	-19445
2005	-27782
2006	-28536
2007	-10804
2008	-10722
2009	-10203
2010	-9362
2011	-12671
2012	-7529
2013	-6900
2014	96607
2015	42007
2016	13251
2017	-37910
2018	-9185
2019	-12254
2020	-9889
2021	-9889
2022	-4800
2023	-4800