Year	Number
1991	23215066
1992	23904463
1993	24592499
1994	25270952
1995	25963814
1996	26668619
1997	27413215
1998	28270357
1999	29065061
2000	29803858
2001	30523609
2002	31233352
2003	31926684
2004	32900743
2005	33734285
2006	34451252
2007	35217804
2008	36018856
2009	37171260
2010	38081598
2011	39490704
2012	40075145
2013	40789298
2014	42179845
2015	42622144
2016	43756699
2017	42974771
2018	43800369
2019	45091808
2020	42419079
2021	44606252
2022	47871825
2023	49477060