Year	Number
1970	609376
1971	655265
1972	701563
1974	853592
1975	933411
1976	975288
1977	988914
1978	1038049
1979	1075880
1980	1083818
1981	1135143
1982	1141387
1983	1217308
1984	1272930
1985	1294990
1986	1381495
1987	1452924
1988	1452966
1989	1468828
1990	1456497
1991	1511084
1992	1566790
1993	1572837
1994	1613182
1995	1651684
1996	1736414
1997	1794515
1998	2153537
1999	2176863
2000	2205426
2001	2246874
2002	2300062
2003	2518642
2004	2583993
2005	2489117
2006	2516116
2007	2499165
2008	2537203
2009	2546102
2010	2615717
2011	2627704
2012	2757435
2013	2754185
2014	2846473
2015	2801439
2016	2759653
2017	2744639
2018	2592970
2019	2602216
2020	2513435
2021	2535579
2022	2633592