Year	Number
1985	14422530
1989	15756000
1990	15265000
1991	14149000
1992	16433000
1993	15768000
1994	15403000
1995	22169700
1996	22338220
1997	22045820
1998	22110390
1999	21886190
2000	21969100
2001	20889900
2002	20954750
2003	20905700
2004	19956170
2005	21096720
2006	19858830
2007	20082030
2008	20341250
2009	20807948
2010	20989348
2011	21008673
2012	21199084
2013	20382763
2014	20650370
2015	20828240
2016	20837750
2017	20861000
2018	21130160
2019	21142000
2020	20871000