Year	Number
1990	146181
1991	147888
1992	151303
1993	157365
1994	197697
1995	155717
1996	157355
1997	159339
1998	159964
1999	160235
2000	160435
2001	160448
2002	160390
2003	160380
2004	160190
2005	160142
2006	160146
2007	159881
2008	159927
2009	159255
2010	159728
2011	159849
2012	159746
2013	160686
2014	161985
2015	163121
2016	164320
2017	165793
2018	167250
2019	168979
2020	170150
2021	171198
2022	172052