Year	Number
1960	-1428
1961	-1423
1962	-1430
1963	-1524
1964	-1518
1965	-1515
1966	-1516
1967	-1619
1968	-1622
1969	-1610
1970	-1633
1971	-1718
1972	-1712
1973	-1718
1974	-1722
1975	-1812
1976	-1815
1977	-1814
1978	-1906
1979	-2029
1980	-1935
1981	-1752
1982	-1876
1983	-1892
1984	-1810
1985	-1785
1986	-1784
1987	-1813
1988	-1831
1989	-1859
1990	-1915
1991	-1595
1992	-1606
1993	-1618
1994	-1630
1995	-1640
1996	-1643
1997	-1661
1998	-1672
1999	-1661
2000	-1618
2001	-1563
2002	-1537
2003	-1699
2004	-1726
2005	-1757
2006	-1780
2007	-1719
2008	-1653
2009	-1659
2010	-1660
2011	-1665
2012	-1569
2013	-1569
2014	-1295
2015	-1295
2016	-1295
2017	-847
2018	-807
2019	-758
2020	-379
2021	-379
2022	-200
2023	-200