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	2400
1988	10000
1989	28900
1990	54100
1991	72300
1992	100200
1993	143800
1994	239200
1995	365000
1996	492800
1997	566200
1998	790000
1999	1395000
2000	1542000
2001	2288000
2002	2449000
2003	2599000
2004	3027000
2005	3530000
2006	3802290
2007	4251207
2008	4620000
2009	4700000
2010	4710000
2011	4820000
2012	4922000
2013	4766000
2014	5100000
2015	5600000
2016	6100000
2017	6400000
2018	6319000
2019	6011000
2020	6236000
2021	5846000
2022	5947000