Year	Number
1970	80217
1971	84959
1972	90192
1975	104056
1976	100217
1978	129776
1979	134658
1980	147216
1984	132889
1998	296188
1999	395611
2000	496253
2006	488438
2008	539887
2009	605236
2011	674534
2014	683977
2015	684404
2016	655049
2017	635478
2020	607558