Year	Number
1990	146178
1991	147885
1992	151300
1993	157362
1994	197694
1995	155715
1996	157353
1997	159337
1998	159962
1999	160233
2000	160433
2001	160446
2002	160388
2003	160378
2004	160188
2005	160139
2006	160143
2007	159878
2008	159925
2009	159253
2010	159726
2011	159847
2012	159744
2013	160684
2014	161983
2015	163119
2016	164318
2017	165791
2018	167248
2019	168977
2020	170148
2021	171196
2022	172050