Year	PPG (TDS, current US$)
1970	9149714.3
1971	11824999.9
1972	12941192.3
1973	17539213
1974	18563112
1975	21510915.4
1976	33976349
1977	48437389
1978	66559162
1979	112995179.3
1980	104295325.5
1981	123753520.8
1982	156832534.9
1983	132536858.5
1984	137631936.1
1985	173159200.2
1986	199291631.1
1987	247368402.9
1988	290038155.4
1989	135488945
1990	321405718.3
1991	291390418.8
1992	364581446.8
1993	354238979.2
1994	429368354.4
1995	477424869.9
1996	503591711.3
1997	453249393.1
1998	433552043.7
1999	303758743.1
2000	169811463.3
2001	127364147.6
2002	171909459.9
2003	193361427.4
2004	207534798.6
2005	204390351.5
2006	156305303.3
2007	157757654.5
2008	103395982.7
2009	162764313.5
2010	109299667.3
2011	124926923.5
2012	131604175.1
2013	194232651.1
2014	291801832.3
2015	331416399.4
2016	396214353.2
2017	422660437.8
2018	523477589.6
2019	581089851.3
2020	1123997906.3
2021	546094836.5
2022	697839777.8