Year	Number
1980	64930
1981	67276
1982	70192
1983	68002
1984	74152
1985	77044
1986	81317
1987	90120
1988	97513
1989	108397
1990	104895
1991	105257
1992	113872
1993	107548
1994	120205
1995	128341
1996	130041
1997	126520
1998	132409
1999	149701
2000	166535
2001	184711
2002	185982
2003	186799
2004	200377
2005	217571
2006	240698
2007	249940
2008	261761
2009	263604
2010	279148
2011	286189
2012	304566
2013	313955
2014	324989
2015	333762
2016	340911
2017	344021
2018	343858
2019	368590
2020	357699