Year	current US$
1995	31262916295.8549
1996	36159537445.8467
1997	37726508202.0947
1998	32089424934.8386
1999	38173236155.3266
2000	42972333877.1622
2001	45967725827.9058
2002	51125455092.2449
2003	45128451273.3979
2004	61301456965.603
2005	64461064536.8418
2006	77313118094.4109
2007	93912107318.6718
2008	100671758889.936
2009	92037936322.6722
2010	107161168580.754
2011	122689693570.838
2012	134948411959.518
2013	148553433543.637
2014	141358715337.238
2015	145413710785.331
2016	151143445420.411
2017	154114986075.754