Year	Number
1996	348285.09245326906
1997	345475.0682488424
1998	335779.44405313506
1999	329494.7240164705
2000	340787.4304611773
2001	340449.62864705204
2002	357469.77315177175
2003	368914.4274013045
2004	397029.30212319526
2005	432968.1785538616
2006	439914.30962168303
2007	443944.99719447305
2008	448581.44561503053
2009	455258.7274863195
2010	466042.2607577721
2011	480727.0879243532
2012	484577.1324413927
2013	486287.0553390261
2014	488416.3149708046
2015	488838.2121734881
2016	488971.05648257834
2017	490835.77770665265
2018	497182.5090907318
2019	500854.8110827871
2020	521772.61881826265