Year	Number
1970	86005
1971	90271
1972	103292
1973	110084
1974	115310
1975	121957
1976	125830
1977	128494
1978	131214
1979	139277
1980	136381
1981	137721
1982	131741
1983	133957
1984	135417
1985	132940
1986	135924
1987	138172
1988	139427
1989	140681
1990	141936
1991	143193
1992	162445
1993	166123
1994	179776
1995	189123
1996	193911
1998	220517
1999	214911
2000	197374
2001	197234
2002	193627
2004	188147
2005	186898
2006	187920
2007	179286
2008	179806
2009	180806
2010	180760
2011	178550
2012	189335
2013	188462
2014	187042
2015	184791
2016	182919
2017	184384
2019	184695
2020	176442
2021	173243
2022	180781