Year	PPG (TDS, current US$)
1970	32999616.6
1971	39081467.7
1972	48777377.3
1973	54594378.9
1974	59724542.6
1975	109578009.4
1976	103132242.2
1977	80922713.6
1978	101516425.1
1979	72822504.4
1980	102304852.4
1981	147389946
1982	115280022.6
1983	77746916.3
1984	63796456.9
1985	89151885.5
1986	198294582.9
1987	62569917.1
1988	78296901.3
1989	56582221.1
1990	23242735.4
1991	22157907.5
1992	24824194.7
1993	17225585.7
1994	2931549.2
1995	16936282.2
1996	259869.5
1997	298874.4
1998	2971086.9
1999	12373415.1
2000	184980381
2001	180149177
2002	118180365
2003	246624505.1
2004	283555429.7
2005	333192808.5
2006	263224217.7
2007	306638950.2
2008	288586691.6
2009	479643762.6
2010	484001216.7
2011	520106304.8
2012	354743527.4
2013	286074507.5
2014	248576897.7
2015	514163476.4
2016	282457419.6
2017	234338745
2018	208574548
2019	178771527.8
2020	141408700.6
2021	1686702791.1
2022	169993794.6