Year	PPG (TDS, current US$)
1970	4865694725.9
1971	4493933029.400002
1972	5485476789.999999
1973	7644280335.999997
1974	8731465030.5
1975	10252634116.599997
1976	12249169573.100004
1977	16566844816.700008
1978	25642144778.600002
1979	35261534478.8
1980	39255534941.60003
1981	46587612968.3
1982	51541869122.59999
1983	52574037389.59998
1984	55515354104.5
1985	62260603516.100006
1986	64782611579.79999
1987	67453506542.59998
1988	82089106693.59999
1989	80548918587.9
1990	84898121605.40001
1991	85679558039.60002
1992	96239043780.40002
1993	93432678721.69997
1994	105422605945.30002
1995	130862786114.7
1996	148945896648.99994
1997	152911124886.30008
1998	138814079112.2
1999	145699958670.49994
2000	156500955077.19998
2001	152239838551.20007
2002	151303742972.89996
2003	172959461133.99997
2004	160864983156.60004
2005	187854313609.80002
2006	226080294241.6
2007	170326094900.69998
2008	195212658702.60004
2009	162392815055.89996
2010	178644685062.20004
2011	180821711720.59998
2012	178774263588.7
2013	202307035074
2014	247035971584.9
2015	295375350971.30005
2016	302320566728.7
2017	304553871321.6
2018	364661072298.7999
2019	378605148540.79987
2020	393860845071.30005
2021	400139834459.6
2022	408211509875.2002