Year	Number
1960	457310
1961	452587
1962	449956
1963	449180
1964	450535
1965	454383
1966	460827
1967	469822
1968	480872
1969	493270
1970	508158
1971	526282
1972	545470
1973	564825
1974	585052
1975	606195
1976	628226
1977	650702
1978	674643
1979	700333
1980	726773
1981	754059
1982	782049
1983	810963
1984	841714
1985	874215
1986	908035
1987	942796
1988	977940
1989	1012469
1990	1047201
1991	1082986
1992	1119350
1993	1156071
1994	1190834
1995	1222376
1996	1251013
1997	1276958
1998	1300805
1999	1324848
2000	1341715
2001	1352881
2002	1368003
2003	1384528
2004	1400893
2005	1418223
2006	1438879
2007	1468595
2008	1503179
2009	1539795
2010	1579617
2011	1623631
2012	1682244
2013	1754590
2014	1833873
2015	1917423
2016	2000494
2017	2085515
2018	2183197
2019	2278244
2020	2367905
2021	2471867
2022	2558980
2023	2626085