Year	Number
1997	271484135.21647334
1998	296369930.6348994
1999	312875355.59859896
2000	325163288.81667286
2001	321405896.954904
2002	316687650.3937184
2003	322010732.4888344
2004	319207224.1674823
2005	334631056.3561506
2006	338891791.95370716
2007	359820729.5494649
2008	376994649.5453678
2009	362275414.38089836
2010	364844521.71894747
2011	364843479.0617486
2012	365610235.13475925
2013	372957185.7500372
2014	360809409.3673647
2015	378470721.9668192
2016	397789572.0676468
2017	431349338.13492894
2018	461906449.25689375
2019	468662306.3207957