Year	PPG (TDS, current US$)
1970	1746726.1
1971	3681838
1972	2980974
1973	2314021.5
1974	6234698.3
1975	6089263.8
1976	4300511.7
1977	3887225.5
1978	5163705.4
1979	6488904
1980	8733234.6
1981	10036013.4
1982	14550764.1
1983	25519233.1
1984	39384292
1985	41236553
1986	51693646.9
1987	29051249.9
1988	17848822.6
1989	19272467.4
1990	31485725.1
1991	27596123.7
1992	25683544.6
1993	30002631.5
1994	37317968.8
1995	43973260.5
1996	39737118.9
1997	42966893.2
1998	48459725.2
1999	55081749.3
2000	60128456.9
2001	34656659
2002	43769591.8
2003	38342138.9
2004	31715404.9
2005	38776325.5
2006	39847297.4
2007	29245090.2
2008	26503283.3
2009	43483892.7
2010	38742071.1
2011	42766781.1
2012	56098221.7
2013	81083888.7
2014	71150130
2015	69327300.4
2016	88519732.5
2017	86766232.9
2018	209720556.7
2019	492339221.1
2020	210515685.9
2021	728615887
2022	455611487.8