Year	PPG (TDS, current US$)
1970	26237550.4
1971	28449919.9
1972	14387526.2
1973	23204135.7
1974	27241754.8
1975	54827362.2
1976	51930975.9
1977	37914744.1
1978	67908590.7
1979	73864348.1
1980	107711786.9
1981	69250000.9
1982	71213949
1983	110681470.6
1984	88949270
1985	95253786
1986	120349123.8
1987	156269087.3
1988	203610243.2
1989	206999140.7
1990	192368266.9
1991	167076151.7
1992	207154375.1
1993	198161691.1
1994	242863492.5
1995	253823737.2
1996	306344764.3
1997	340219078.1
1998	384275812.2
1999	390291507.3
2000	374351732.6
2001	205239583.2
2002	179568349.5
2003	223640349.4
2004	229912646.4
2005	277267231.9
2006	255862201.9
2007	200298872.3
2008	202814931.5
2009	220843478.7
2010	267297261.1
2011	305171108.7
2012	422354335.7
2013	560190234.6
2014	716435576
2015	931707744.1
2016	1496864226.7
2017	1783218652.6
2018	2402998959.8
2019	2222030542.1
2020	2448851718
2021	2946517091.7
2022	1944251859.6