Year	Number
1991	7398011
1992	7500078
1993	7933806
1994	8070103
1995	8152297
1996	8260674
1997	8382335
1998	8080886
1999	8185146
2000	8307277
2001	8387525
2002	8465150
2003	8446559
2004	8381930
2005	8267636
2006	8184604
2007	7981848
2008	7907105
2009	7740935
2010	7663755
2011	7528270
2012	7392963
2013	7289386.5
2014	7201072
2015	7112949.5
2016	7073164
2017	7028712.5
2018	6948797.5
2019	6923443
2020	6876844.5
2021	6851760