Year	PPG (TDS, current US$)
1970	34347450.9
1971	37900324.2
1972	61336160.5
1973	97787924.8
1974	187423536.9
1975	152012632.5
1976	88941917.8
1977	117369654.7
1978	143200731.8
1979	179277070.5
1980	396583113.6
1981	208847481.1
1982	128307138.7
1983	178441788.9
1984	286692536
1985	300330148.1
1986	238823733
1987	195017116.5
1988	177426234.7
1989	191529450.5
1990	137167810.9
1991	97715423.1
1992	55663826
1993	11814738.1
1994	854941.4
1996	117594.6
1999	0
2000	0
2001	0
2002	412005212
2003	140603026.4
2004	126143787.4
2005	208514876.5
2006	275802798.7
2007	421209233.5
2008	444357525.1
2009	466666028.2
2010	213013960.6
2011	252468852
2012	225143797.4
2013	341832741.9
2014	357470785.7
2015	304998415.3
2016	351316791.9
2017	249373155.9
2018	227658811.2
2019	968112192.9
2020	220559925.1
2021	310886259.4
2022	644345957.9