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	65
1994	5000
1995	14000
1996	30000
1997	57200
1998	115500
1999	216567
2000	818524
2001	2224600
2002	3692700
2003	6498423
2004	13735000
2005	30013500
2006	49076239
2007	55240400
2008	55681476
2009	54942815
2010	53928830
2011	55576481
2012	59343693
2013	62458800
2014	61170229
2015	60720073
2016	56717856
2017	55714733
2018	53933592
2019	54842940
2020	53977690
2021	55925908
2022	49304301