Year	Number
1960	0
1961	-133982
1962	-131607
1963	-129202
1964	-126712
1965	-124241
1966	-122151
1967	-119938
1968	-117510
1969	-114875
1970	-116631
1971	-136808
1972	-138485
1973	-116081
1974	-69596
1975	-3437
1976	47154
1977	84000
1978	110097
1979	450001
1980	1078233
1981	997103
1982	552153
1983	73873
1984	-351354
1985	282435
1986	199664
1987	326899
1988	148304
1989	68004
1990	30184
1991	-6127
1992	-1320633
1993	-278
1994	-276644
1995	296208
1996	147987
1997	151546
1998	148849
1999	148403
2000	940739
2001	344288
2002	-834546
2003	-578225
2004	-524871
2005	-632467
2006	-628923
2007	-563471
2008	-525915
2009	-338507
2010	-431891
2011	-890633
2012	-1647986
2013	-1906315
2014	-2037911
2015	-2172159
2016	-2290411
2017	-1574581
2018	-1309609
2019	-1177218
2020	-588736
2021	-471395
2022	-165988
2023	-165988