Year	Number
1990	68132
1991	67907
1992	72290
1993	70219
1994	65406
1995	62305
1996	59368
1997	56850
1998	54989
1999	53748
2000	52978
2001	52440
2002	51853
2003	51199
2004	50490
2005	49773
2006	49089
2007	48134
2008	46559
2009	44557
2010	42645
2011	41637
2012	40129
2013	39479
2014	39469
2015	38554
2016	38049
2017	37665
2018	37541
2019	37943
2020	39289
2021	41672
2022	49747