Year	Number
1990	12079990
1991	12026944
1992	10697352
1993	8748246
1994	7612027
1995	7613559
1996	7536895
1997	7426336
1998	7364542
1999	7528687
2000	8438167
2001	8918714
2002	7504584
2003	7147048
2004	7458626
2005	7199115
2006	8386958
2007	10775920
2008	10125840
2009	10205926
2010	10301334
2011	9932364
2012	9914450
2013	10557676
2014	11936839
2015	13024365
2016	13307587
2017	14770213
2018	15028283
2019	14799055
2020	14783928
2021	15014724
2022	17901200
2023	18282288