Year	Number
1989	2552024
1990	2742105
1991	2939270
1994	3571395
1998	4244415
1999	4239197
2000	4141946
2001	4250400
2002	4353817
2003	4446841
2004	4593492
2005	4657674
2006	4790382
2007	4815932
2008	4671139
2009	4687958
2010	4689600
2011	4756111
2012	4843800
2013	5233115
2014	5220975
2015	5279196
2016	5164481
2017	5052180
2018	4878960
2019	5036694
2020	5100811
2021	5353649