Year	PPG (TDS, current US$)
1970	4531784.5
1971	7548379.9
1972	9895843.5
1973	11631348.3
1974	14728100.8
1975	21231356.2
1976	28799407.5
1977	53089604.5
1978	77217004.1
1979	125906028.8
1980	181584515.9
1981	264532212.2
1982	230110857.7
1983	302404188.7
1984	335019713.3
1985	455598172.8
1986	539094139.2
1987	681807529.3
1988	895105761
1989	502424669.8
1990	551743068.3
1991	630423012.5
1992	662121779.8
1993	514827547.7
1994	489879671.3
1995	538379012
1996	908664323.3
1997	789406813.2
1998	808071171.8
1999	465719012
2000	547144218.4
2001	532350408.9
2002	483760184.3
2003	1028680338.5
2004	567495846.4
2005	495107047.6
2006	542235841.7
2007	630924480.2
2008	2605654205.7
2009	544661685
2010	624802709.7
2011	735794027.1
2012	740714471.3
2013	717665394.7
2014	1115815129.8
2015	1794892106.6
2016	1847988129.6
2017	939435649
2018	1095147630.4
2019	2134396073.8
2020	2298847262.2
2021	2625841235
2022	3612955977