Year	Number
1971	374352
1972	398851
1973	431442
1974	470193
1975	411639
1976	410623
1977	438697
1978	433918
1979	433047
1980	441796
1988	457067
1990	507156
1991	561507
2008	423854
2009	351828
2011	329503
2012	197827
2014	187532
2015	178741
2016	193248
2017	265113
2018	695710
2019	358240
2020	193153.609375
2021	192493
2022	175616