Year	PPG (TDS, current US$)
1970	83409136.6
1971	104678707.7
1972	140422680.4
1973	207970230.7
1974	292001763.4
1975	523920155.4
1976	761025453.9
1977	1262326981.1
1978	2064914115.4
1979	2103723246.7
1980	1763304639.5
1981	2039121798.3
1982	2236153958.1
1983	2524108008.1
1984	3228207885.5
1985	3987616473.8
1986	4691800272.2
1987	5677157175.6
1988	6947881419.9
1989	7715729246.1
1990	7394726059.3
1991	7582428263.9
1992	8175336275.2
1993	8921287544.4
1994	8791971040.3
1995	9490342798.5
1996	11749429489.9
1997	8919014183
1998	7134336148.3
1999	9250012381.2
2000	7664955377.6
2001	6710346368.8
2002	6568222072.3
2003	7493183598.1
2004	10377101984.2
2005	8177281917.8
2006	9044610551.5
2007	10793129775.1
2008	9497619189.5
2009	9864655521.3
2010	11106152440.7
2011	9568949734.2
2012	9864692742.5
2013	11619682254.7
2014	28346793755.2
2015	14228471172.1
2016	15989598576
2017	18346213274.8
2018	17521365176.3
2019	21254297066
2020	28035080214.5
2021	37912829079.6
2022	35641394122.1