Year	Number
1960	72000
1961	75151
1962	78444
1963	81881
1964	85475
1965	89215
1966	93125
1967	97205
1968	101471
1969	105911
1970	110553
1971	115397
1972	120461
1973	125732
1974	131242
1975	140539
1976	156130
1977	173400
1978	192609
1979	213945
1980	237680
1981	263971
1982	293212
1983	325693
1984	361825
1985	401848
1986	444742
1987	489651
1988	539168
1989	593534
1990	653469
1991	719456
1992	792212
1993	872094
1994	960157
1995	1032832.0000000001
1996	1089287
1997	1148659
1998	1211356
1999	1277476
2000	1347303
2001	1420738
2002	1498286
2003	1580067
2004	1666434
2005	1741060
2006	1804840
2007	1870956
2008	1939590
2009	2010542
2010	2084194
2011	2160544
2012	2239691
2013	2321737
2014	2406789
2015	2494957
2016	2586355
2017	2681100
2018	2779317
2019	2874373
2020	2972988
2021	3075257
2022	3181655
2023	3292497