Year	Number
1960	1211537
1961	1225077
1962	1241623
1963	1258857
1964	1277086
1965	1294566
1966	1308597
1967	1318946
1968	1331214
1969	1345249
1970	1360076
1971	1376955
1972	1392518
1973	1405951
1974	1418169
1975	1429352
1976	1439576
1977	1450211
1978	1460188
1979	1468333
1980	1477219
1981	1487666
1982	1498414
1983	1508745
1984	1518617
1985	1528781
1986	1540190
1987	1552221
1988	1561900
1989	1568131
1990	1569174
1991	1561314
1992	1533091
1993	1494128
1994	1462514
1995	1436634
1996	1415594
1997	1399535
1998	1386156
1999	1390244
2000	1396985
2001	1388115
2002	1379350
2003	1370720
2004	1362550
2005	1354775
2006	1346810
2007	1340680
2008	1337090
2009	1334515
2010	1331475
2011	1327439
2012	1322696
2013	1317997
2014	1314545
2015	1315407
2016	1315790
2017	1317384
2018	1321977
2019	1326898
2020	1329522
2021	1330932
2022	1348840
2023	1366188