Year	Number
1960	0
1965	0
1970	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1994	524
1995	1000
1996	1400
1997	1600
1998	1900
1999	2300
2000	2500
2001	2700
2002	14313
2003	99000
2004	101000
2005	105656
2006	105600
2007	147000
2008	175045
2009	189738
2010	198212
2011	216530
2012	216000
2013	212063
2014	188351
2015	187741
2016	176648
2017	176694
2018	184944
2019	147790
2020	145931
2021	171805