Year	Number
1970	941322
1971	1017372
1972	1123779
1973	1145703
1974	1132951
1976	1088089
1980	1267323
1981	1293213
1982	1315062
1983	1367754
1984	1421713
1985	1462794
1986	1526086
1987	1898634
1988	1961963
1989	2024831
1990	2081842
1991	2106050
1992	2185277
1993	2246642
1994	2315541
1995	2314054
2010	2524673
2011	2573842
2012	2590357
2013	2605597
2014	2569189.5
2015	2611444.75
2016	2618895
2017	2648660
2018	2727965
2021	2598417