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
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	766
1998	1480
1999	2432
2000	2500
2001	2500
2002	2700
2003	10500
2004	16000
2005	24000
2006	45500
2007	86000
2010	90000
2012	100302
2013	99887
2014	106524
2015	120517
2016	151008
2017	124211
2018	100000
2019	84000
2020	69000
2021	69000
2022	134320