Year	Number
1960	159892
1961	162501
1962	168358
1963	176462
1964	185782
1965	195462
1966	205447
1967	215699
1968	225350
1969	233321
1970	238887
1971	241794
1972	242291
1973	240954
1974	238758
1975	236533
1976	234387
1977	232361
1978	231185
1979	231736
1980	234592
1981	240152
1982	248429
1983	258605.00000000003
1984	269937
1985	281813
1986	294157
1987	306969
1988	319757
1989	331943
1990	343119
1991	353073
1992	361876
1993	369854
1994	377547
1995	385339
1996	393487
1997	401564
1998	409837
1999	418604
2000	427979
2001	438081
2002	448896
2003	460147
2004	471453
2005	482559
2006	493320
2007	503823
2008	514347.99999999994
2009	525313
2010	536969
2011	549439
2012	562531
2013	575841
2014	588781
2015	600942
2016	612167
2017	622567
2018	632418
2019	642090
2020	651875
2021	661838
2022	671858
2023	681876