Year	Number
1960	550238
1961	568218
1962	587187
1963	605132
1964	623806
1965	643291
1966	662824
1967	683102
1968	703020
1969	722769
1970	743242
1971	763806
1972	783527
1973	803693
1974	825631
1975	848231
1976	868590
1977	889375
1978	912282
1979	935806
1980	958685
1981	978646
1982	996158
1983	1011504
1984	1025879
1985	1045563
1986	1069455
1987	1092518
1988	1115587
1989	1136171
1990	1154314
1991	1171421
1992	1186936
1993	1200576
1994	1212634
1995	1224409
1996	1235477
1997	1246476
1998	1257618
1999	1267608
2000	1277855
2001	1289132
2002	1299347
2003	1309404
2004	1322001
2005	1336332
2006	1349533
2007	1364360
2008	1385966
2009	1413929
2010	1441507
2011	1481559
2012	1533135
2013	1576990
2014	1616470
2015	1653041
2016	1688159
2017	1724827
2018	1761992
2019	1801010
2020	1837793
2021	1873406
2022	1922136
2023	1976941