Year	Number
1969	12000
1971	300
1975	300000
1976	500070
1983	450
1984	650
1985	810
1986	880
1987	800
1988	800
1989	480
1990	272281
1991	230290
1992	174076
1993	251578
1994	360106
1995	297908
1996	327696
1997	208509
1998	151187
1999	138433
2000	120694
2001	126239
2002	44751
2003	75967
2004	72084
2005	41624
2006	27279
2007	24640
2008	24802
2009	24598
2010	26213
2011	24212
2012	3972
2013	2970
2014	1918
2015	1972
2016	1397
2017	1559
2018	1808
2019	2020
2020	2086
2021	4349
2022	2251
2023	2370