Year	Number
1970	677546
1991	557475
1994	738758
1995	796191
1998	852226
1999	851435
2000	891009
2001	834572
2002	756314
2003	668040
2004	591426
2005	533465
2017	250667
2018	354967
2019	377824
2020	443577
2021	464406