Year	PPG (TDS, current US$)
1970	510368527.7999999
1971	569411077.9000001
1972	671065088.8
1973	1261035691.6
1974	1104691989.2000003
1975	1341622553.3000004
1976	1485481901.0000005
1977	1652868428.6
1978	2106856977.3999999
1979	2839652197.6000004
1980	4134373401.2000012
1981	4591505734.499999
1982	5017677057.900001
1983	5539041613.900001
1984	6731355768.299999
1985	7790976921.5
1986	6272900918.2
1987	5455515712.999999
1988	6742462069.8
1989	6456246874.3
1990	8162878217.9
1991	7925705020.999999
1992	6725752427.2
1993	5453518615.499998
1994	8527330067.7
1995	9288066169.7
1996	11111558138.8
1997	9265467393.6
1998	10250775288
1999	8617832235.300001
2000	10306938442.399998
2001	10629017745.599998
2002	8487884241.199999
2003	9362771563.5
2004	9301466342.6
2005	19293222467.600002
2006	18800548004.4
2007	12901892688.200003
2008	11919209202
2009	11616005649.099997
2010	9903929629.900002
2011	11486135817.4
2012	15208009522.799995
2013	20860757266.1
2014	20250557236.200005
2015	31048492963.899998
2016	25389688510.30001
2017	26519726388.299995
2018	41474672105.20001
2019	39435685203.49999
2020	38529193349.9
2021	44032082900.7
2022	45168566115.399994