Year	Number
1960	957
1961	984
1962	1015
1963	1050
1964	1087
1965	1123
1966	1167
1967	1203
1968	1226
1969	1251
1970	1277
1971	1303
1972	1329
1973	1355
1974	1392
1975	1440
1976	1497
1977	1541
1978	1570
1979	1603
1980	1641
1981	1683
1982	1727
1983	1775
1984	1831
1985	1896
1986	1966
1987	2033
1988	2082
1989	2117
1990	2154
1991	2194
1992	2247
1993	2310
1994	2372
1995	2434
1996	2501
1997	2552
1998	2580
1999	2606
2000	2630
2001	2656
2002	2689
2003	2730
2004	2773
2005	2809
2006	2836
2007	2851
2008	2848
2009	2832
2010	2840
2011	2882
2012	2909
2013	2911
2014	2896
2015	2882
2016	2877
2017	2869
2018	2875
2019	2895
2020	2914
2021	2933
2022	2948
2023	2964