Year	Number
1981	50
1982	100
1985	60
1986	50
1987	50
1988	35
1989	65
1990	493
1991	738
1992	841
1993	1040
1994	1361
1995	1902
1996	2168
1997	2376
1998	3536
1999	4412
2000	9278
2001	17937
2002	30624
2003	37992
2004	47380
2005	60447
2006	72793
2007	551741
2008	373532
2009	389753
2010	395579
2011	395950
2012	394112
2013	396711
2014	360291
2015	340116
2016	311059
2017	191635
2018	138583
2019	189254
2020	189866
2021	115792
2022	109012
2023	115513