Year	Number
1972	2635
1978	3773
1981	4302
1982	4834
1984	4980
1985	5338
1996	6059
2000	9125
2001	10391
2002	10699
2004	13654
2005	15394
2011	31525
2012	38068
2013	39337
2014	43661
2015	55786
2020	51192
2021	50740
2022	54742