Year	Number
1980	99124
1981	86936
1982	88509
1983	81244
1984	90560
1985	115311
1986	124511
1987	155244
1988	170947
1989	184830
1994	179345
1995	192148
1996	187845
1997	206997
1998	247091
1999	273132
2000	310512
2001	250769
2002	230529
2003	216963
2004	227827
2005	247631
2006	249568
2007	267572
2008	255696
2009	272268
2010	290670
2011	286453
2012	269675
2013	274254
2014	284898
2015	257561
2016	292389
2017	297685