Year	Number
1990	52238
1991	51653
1992	51497
1993	51634
1994	52005
1995	52558
1996	52980
1997	53180
1998	54232
1999	53303
2000	53276
2001	52954
2002	52340
2003	51519
2004	50600
2005	49854
2006	49525
2007	49704
2008	50155
2009	50599
2010	57980
2011	50846
2012	50476
2013	50062
2014	49815
2015	49484
2016	48725
2017	47470
2018	45884
2019	44245
2020	42724
2021	41354
2022	40138