Year	Number
1971	113270
1972	114487
1974	123654
1979	175760
1980	233578
1984	530021
1988	366455
1989	345302
1990	348922
2005	621173
2006	726998
2007	833568
2008	945245
2009	1022464
2011	1313804
2012	1405063
2014	1493830
2015	1536209
2016	1561307
2017	1534273
2018	1548208
2019	1494520
2021	1623720