Year	Number
1970	826400
1971	994500
1972	1286800
1973	1787400
1974	2219700
1975	2527500
1976	3103200
1977	3781300
1978	4431100
1979	4656100
1980	5059100
1981	6098100
1982	6028700
1983	5567500
1984	6494300
1985	6468100
1986	7115400
1987	7568900
1988	8823700
1989	8983400
1990	9223100
1991	10401800
1992	11176800
1993	12009000
1994	13924500
1995	15977200
1996	17138800
1997	12650200
1998	12613600
1999	8046800
2000	9916365
2001	12453812
2002	12113452
2003	12221066
2004	26780550
2005	26835524
2006	29867483
2007	30405918
2008	29766093
2009	27421235
2010	59384361.605798
2011	70912258.1090481
2012	79405799.80957
2013	81721356
2014	85215879.5097387
2015	90095131
2016	99274010
2017	108393123
2018	115154100.909
2019	91323153
2020	37523686.817
2021	33549828