Year	constant 2015 US$
2004	1375652120.723546
2005	1971723894.4724631
2006	2095667149.462235
2007	2222864538.643957
2008	2280764951.0142484
2009	2225123040.2088647
2010	2904009691.235193
2011	2547443139.983063
2012	3139130346.2960243
2013	3162722819.187664
2014	3376400716.4589505
2015	3335818635.9837556
2016	3191224872.4444847
2017	3694634229.1083736
2018	3645864784.845001
2019	3649178042.114567
2020	3791842028.400471
2021	4026936669.307152
2022	4107474125.634818
2023	4312848100.808315