Year	Number
1996	5750449.616739419
1997	6186266.882434002
1998	6328429.877099085
1999	7115930.802434592
2000	7778590.999872316
2001	8160225.185179737
2002	9043190.155163327
2003	9192544.326192204
2004	10209662.038566587
2005	11488151.565190138
2006	12898473.61959298
2007	14613529.784368638
2008	15475609.71876703
2009	15905711.5819416
2010	17437169.26442983
2011	19068517.60459392
2012	20446470.377958782
2013	21285585.147254176
2014	21852006.860835962
2015	23619335.253475137
2016	25289047.232412815
2017	27119321.166789595
2018	29458450.954645976
2019	29134874.002867676