Year	Number
1998	500282571.5878747
1999	526129612.269729
2000	557051074.347646
2001	555272074.7810334
2002	567795804.6633238
2003	567029753.8371905
2004	594526471.9336634
2005	613392162.7347369
2006	709156453.2659385
2007	726390765.9562745
2008	731319795.2341111
2009	711235050.2003111
2010	719820891.2581017
2011	734161121.6186652
2012	745568404.7557882
2013	758156232.2526478
2014	763952881.8875983
2015	788114608.2063999
2016	825414522.0983757
2017	874808571.4124982
2018	905881478.4767545
2019	928930206.150099