Year	Number
1974	1633300
1975	1759200
1976	1870900
1977	1860800
1978	1902100
1979	2058200
1980	2147000
1981	2175900
1982	2293000
1983	2453600
1984	2613700
1985	2626000
1986	2681300
1987	2771100
1988	2839300
1989	2856400
1990	2909700
1991	2900400
1992	3071500
1993	4074900
1994	4200900
1995	4267900
1996	4394400
1997	4539500
1998	4528100
1999	4649100
2000	4634347
2001	5121901
2002	4965837
2003	4891195
2004	5519366
2005	5846449
2006	6352567
2007	6990994
2008	7102413
2009	7497275
2010	9337292.293278927
2011	10080702.725144312
2012	10601539.959699163
2013	11372493.908308672
2014	12224523.256578416
2015	12861795
2016	13594565
2017	14403021.138
2018	15276297.006304612
2019	15584884.005128356
2020	8751517.8654
2021	9946993.382000001