Year	Number
1970	2450495
1971	2294272
1972	2081601
1973	1907568
1974	1713202
1975	1477162
1976	1286903
1977	1138663
1978	1032216
1979	1005137
1980	1001419
1981	999616
1982	1029356
1983	983687
1984	938701
1985	982338
1986	1049713
1987	1127924
1988	1140716
1989	1137841
1990	1176610
1991	1071696
1992	910991
1993	838722
1994	781876
1995	730785
1996	678288
1997	626118
1998	577606
1999	534006
2000	507886
2001	468747
2002	418545
2003	379875
2004	348091
2005	320805
2006	295968
2007	275295
2008	258356
2009	242512
2010	223979
2011	204515
2012	195144
2013	181308
2014	164701
2015	148194
2016	135167
2017	128068
2018	109110
2019	89753
2020	74130
2021	59287
2022	51680