Year	current US$
2000	4468876681.16698
2001	4313397728.212319
2002	4778039959.612677
2003	5744185953.810077
2004	7234954978.210296
2005	8304156495.344888
2006	7996908689.249925
2007	9519099075.805557
2008	10370351285.86505
2009	8598663690.939236
2010	10131343858.028612
2011	12020840616.041079
2012	12290759697.370941
2013	12513375902.386097
2014	13118657494.187729
2015	11866898760.214502
2016	12402226419.352476
2017	13675551844.148806
2018	14779297478.84028
2019	15403068201.445633
2020	11191419374.948055
2021	13601215202.12592
2022	17265379044.216602
2023	18310551685.06131