Year	Number
1975	17139942
1976	18860919
1977	21480315
1978	23696386
1979	25923617
1980	27983616
1981	30666195
1982	33370173
1983	36311460
1984	39051398
1985	42089636
1986	44940767
1987	47969833
1988	51821949
1989	56003046.5
1990	61162009
1991	67014981
1992	73647029
1993	83816420
1994	98582770
1995	117804065
1996	139381506
1997	164070554
1998	189886189
1999	221279024
2000	267806573
2001	313890068
2002	354213400
2003	405128438
2004	466406631
2005	497123500
2006	526624216
2007	531773633
2008	514059129
2009	489540396
2010	465928348
2011	451912194
2012	441674711
2013	427719320
2014	407318162
2015	384881793
2016	351496477
2017	340016415
2018	328153194
2019	318647072
2020	303653602
2021	297857929
2022	267085239