Year	current US$
1995	15034683041.62377
1996	14704469139.297848
1997	13000451765.880444
1998	12982709558.399632
1999	13598213988.267982
2000	12383868175.421204
2001	13548015006.887024
2002	15202799141.388655
2003	18526587186.458393
2004	21075083681.93519
2005	21283785655.732285
2006	23137185708.127026
2007	26991588280.479694
2008	30265644321.06718
2009	25310309030.743343
2010	23334787508.66671
2011	22557886241.313274
2012	18861272003.66133
2013	18190814425.954952
2014	17973746772.2517
2015	16230758960.908195
2016	15644678588.271633
2017	16203452041.370617
2018	17329828382.5294
2019	16036462277.670563
2020	16119264289.274754
2021	18654000394.015205
2022	19819214649.414474
2023	21083588846.74351